TEMPORARY TRAFFIC CONTROL PLAN DEVELOPMENT WORKSHOP. Local Sponsor:

Transcription

1 TEMPORARY TRAFFIC CONTROL PLAN DEVELOPMENT WORKSHOP Local Sponsor: 1

2 TEMPORARY TRAFFIC CONTROL PLAN DEVELOPMENT WORKSHOP Instructors Tapan K. Datta, Phd. P.E. Tim Gates, Phd. P.E. Jonathan Kay Introductions UTILITY WORK ZONES 2

3 TRAFFIC CONTROL STRATEGIES FOR URBAN WORK ZONES Training Program FHWA GRANT DTFH61-11-RA

4 DISCLAIMER Opinions, findings, and conclusions expressed in this presentation are those of contractor(s) and not necessarily those of USDOT or FHWA Materials prepared under contract with FHWA Content is living and subject to change URBAN WORK ZONES 4

5 5 OUTLINE Background Purpose and Objectives Unique characteristics of urban work zones Temporary traffic control strategies Steps for TTC plan development Example plans

6 BACKGROUND Aging infrastructure = More work zones Two primary work zone objectives: Maintain safety for ALL ROAD USERS Maintain acceptable levels of mobility Balancing safety and mobility Careful planning, design, and implementation of work zone is key URBAN WORK ZONES 6

7 THE MUTCD MUTCD Chapter 6 presents Temporary traffic control (TTC) Typical Applications (TAs) Common work zone TTC scenarios Adjust TAs to field conditions URBAN WORK ZONES 7

8 URBAN ROADWAY ENVIRONMENTS Urban roadway environments High density of land access High density of intersections and/or driveways URBAN WORK ZONES 8

9 URBAN ROADWAY ENVIRONMENTS Greater traffic demand and presence of non-motorized road users Presence of public transit stops On-street parking Visual clutter Traffic signs, billboards Driver distractions Lower travel speeds URBAN WORK ZONES 9

10 PURPOSE AND NEED Characteristics of urban work zones Special consideration required Strategies to address site-specific concerns Process for developing an effective TTCP Example plans for common urban scenarios URBAN WORK ZONES 10

11 CHARACTERISTICS AND ISSUES Urban Work Zones 11

12 HIGH DENSITY OF HOMES AND BUSINESSES Access driveways Increased potential for traffic conflicts Pedestrians and other nonmotorized traffic must be able to access facilities Land access interfering with WZ TTC URBAN WORK ZONES 12

13 HIGHER OR WIDE RANGING TRAFFIC DEMAND Urban WZ s often experience high traffic demand Demand varies Peak vs. off-peak Lane closures may result in queue buildup Field conditions may require adjustment URBAN WORK ZONES 13

14 LOWER TRAVEL SPEEDS Travel speeds relatively low Traffic congestion Limited right-of-way Presence of pedestrian URBAN WORK ZONES 14

15 HIGH DENSITY OF INTERSECTIONS AND/OR DRIVEWAYS Land access legal responsibility Interruption of through traffic Increased access-related traffic conflicts Increased intersection-related traffic conflicts Short street blocks URBAN WORK ZONES 15

16 SPACE LIMITATIONS Building too close to roadway Capacity issue Limited space for TTC, workers, work vehicles, and equipment Limited space for buffers or work zone shielding URBAN WORK ZONES 16

17 ON-STREET PARKING, LACK OF A PAVED SHOULDER, OR OTHER ATYPICAL GEOMETRIC CHARACTERISTICS May involve geometric characteristics not typically observed in other locations On-street parking stalls Curb and gutter design Adjacent sidewalks URBAN WORK ZONES 17

18 PEDESTRIAN, NON-MOTORIZED AND PUBLIC TRANSIT CONCERNS Increased presence of pedestrians and/or bicyclists Including associated facilities Often adjacent to the roadway Bus stops or other forms of public transit Associated pedestrian access URBAN WORK ZONES 18

19 TRAFFIC CONTROL STRATEGIES Urban Work Zones 19

20 TRAFFIC CONTROL STRATEGIES These characteristics may result in impacts to safety and mobility if not adequately addressed TTCPs for urban work zones must: Provide access for all road users Both motorized and non-motorized Provide access for adjacent properties Provide clear, consistent traffic control that accommodates access URBAN WORK ZONES 20

21 MAINTAINING ACCESS TO HOMES AND BUSINESSES Impact on access to adjacent land Access driveways Driveway access-related traffic conflicts Driveway closure Alternative access Flagger control TTCPs should allow at least limited access Construction staging to avoid disruptions Public hearings may help to identify relevant issues URBAN WORK ZONES 21

22 MAINTAINING ACCESS TO PARKING FACILITIES Maintain parking access Provide additional space for TTC/storage of work vehicles/equipment TTC should include: Channelizing devices Similar to a shoulder taper (1/3L) No parking signs as necessary Shield work area and increase buffer URBAN WORK ZONES 22

23 MAINTAINING ACCESS TO INTERSECTIONS AND/OR DRIVEWAYS Minimize movement restrictions at intersections/driveways Consider queuing problem Minimize restriction to critical movements Consider the impact on sight distance URBAN WORK ZONES 23

24 MAINTAINING ACCESS FOR PEDESTRIANS AND OTHER NON-MOTORIZED FACILITIES Maintain existing accessibility features ADA compliant sidewalks and crosswalks Devices which assist visual or auditory impaired road users Channelizing devices with detectable edges Encourage safe crossing behavior Encourage intersection crossing and discourage mid-block crossing Ensure TTC, work vehicles or equipment do not interfere with sidewalks URBAN WORK ZONES 24

25 MAINTAINING ACCESS TO PUBLIC TRANSIT STOPS Coordinate with transit authorities Access to terminal and/or stops If access can not be maintained: Relocate bus stops URBAN WORK ZONES 25

26 SPECIAL EVENTS AND OTHER CONSIDERATIONS Special events Planned event Unplanned event Special consideration No uniform guidelines May occur at other long-term work Requires planning Schedule work to avoid special events URBAN WORK ZONES 26

27 USE OF SPECIFIC TEMPORARY TRAFFIC CONTROL DEVICES Channelizing devices, Type 3 Barricades Urban WZ space limitations Prevents non-motorized traffic from entering work areas Shielding highway workers Removable barricades Drums/cones Vertical panels may be useful alternative in Urban WZ URBAN WORK ZONES 27

28 USE OF SPECIFIC TEMPORARY TRAFFIC CONTROL DEVICES Portable Changeable Message Signs Can convey complex messages Useful in Urban WZ s where complex messages may be necessary to navigate WZ Avoid information overload URBAN WORK ZONES 28

29 USE OF SPECIFIC TEMPORARY TRAFFIC CONTROL DEVICES Arrow Boards Provides additional warning and directional guidance Such dominant devices may minimize the need for further signage Consider visual clutter URBAN WORK ZONES 29

30 USE OF SPECIFIC TEMPORARY TRAFFIC CONTROL DEVICES Temporary Traffic Control Signals May be used only when other means are ineffective Suitable alternative for specific scenarios Rail-highway grade crossing or other unique situations Must be used in conjunction with other devices to alert road users URBAN WORK ZONES 30

31 LAYOUT OF TEMPORARY TRAFFIC CONTROL DEVICES Location of TCD as per TA may be difficult to implement due to: Existing traffic control devices Proximity to intersections and/or driveways Sight distance obstructions fixed objects Information overload TTC devices must be visible and conspicuous May require relocation of TCDs Increase buffer space URBAN WORK ZONES 31

32 ENSURE SIGNS ARE CONSPICUOUS AND WELL-MARKED Urban roadways often involve complex navigational tasks Especially for unfamiliar drivers Further complicated by TTC, workers and equipment Clear and effective navigational signage is critical Utilize large street signs with block numbering where possible Advance signage should be provided to notify alternative land access URBAN WORK ZONES 32

33 MODIFICATION OF EXISTING SIGNAL TIMING Traffic operations may be impacted by TTC Lane closures or prohibited turning movements Existing signal timing plans should be analyzed and altered if operations are impacted Cycle lengths, phasing, and splits Pedestrian walk times Work vehicles, equipment and TTC should not obscure signal heads Signal heads not intended for use should be bagged or covered URBAN WORK ZONES 33

34 GEOMETRIC CONSIDERATIONS Maximize turning radii of affected intersections and/or driveways based on available geometry Improves maneuverability Ensure that this does not encourage higher speeds/turning Minimize the space needed for storage of work vehicles and equipment Maximize the space for road users Adding buffer space URBAN WORK ZONES 34

35 IMPACT OF WORK SPACE NEAR INTERSECTION No uniform guidelines can cover all of the potential issues which may occur May involve work area: Before or upstream of an intersection After or downstream of an intersection Within an intersection URBAN WORK ZONES 35

36 WORK SPACE BEFORE (UPSTREAM) AN INTERSECTION Consider early closure or adjustment to longitudinal buffer space Channelizes traffic in advance of the work area Consider separating the traffic stream (through movements vs. turning movements) upstream of the closure Reduces downstream traffic conflicts and queuing URBAN WORK ZONES 36

37 WORK SPACE WITHIN AN INTERSECTION Use warning devices to warn motorists in all directions Use Road Work Ahead signs Use of flaggers when TTC require alteration of normal operations Provide closures as early as reasonable Early closures may be impractical due to traffic demand Ensure work space is well defined and shielded URBAN WORK ZONES 37

38 WORK SPACE AFTER (DOWNSTREAM) AN INTERSECTION Consider an early closure or an increase in longitudinal buffer space Channelizes traffic well in advance of the work area Consider traffic demand which may make such closures impractical Right-turning movements may require exclusive lane Ensure work areas are well defined and shielded for highway workers URBAN WORK ZONES 38

39 ROLE OF HIGHWAY WORKERS AND FLAGGERS Ensure devices are properly implemented, clean and conspicuous during operations Remove or cover devices not intended to be in use Use of flaggers a critical concern in Urban WZ s Use as suggested in typical applications Consider conspicuity of TCD Consider staging of TCD of work URBAN WORK ZONES 39

40 TEMPORARY TRAFFIC CONTROL PLAN DEVELOPMENT Urban Work Zones 40

41 DEVELOPMENT OF TTCP 1. Collect necessary characteristics about the site and work scenario 2. Determine appropriate TA for scenario 3. Modify TA based on unique characteristics of urban work zones 4. Develop appropriate TTCP 5. Review and modify TTC in the field as necessary SHORT TERM WORK ZONES 41

42 STEP 1: OBTAIN SITE AND WORK CHARACTERISTICS Site Characteristics Geometric characteristics (lane width, number of lanes, etc.) Existing traffic control (location of devices, posted speed limit, etc.) Traffic characteristics (both motorized and non-motorized) Environmental or other surrounding characteristics Work Characteristics Proposed work activity Proposed work duration (including upper and lower bounds) Necessary workers, vehicles, and equipment Additional special considerations URBAN WORK ZONES 42

43 STEP 2: DETERMINE APPROPRIATE TYPICAL APPLICATION (TA) Select appropriate Typical Application from the MUTCD, Consider state MUTCDs, standard plans, as well as local regulations TA or Example Plan from the TTCP Selection Software Selecting a TA or Example Plan is NOT the last step Modify to fit actual field conditions, as well as specific characteristics of the work URBAN WORK ZONES 43

44 STEP 3: MODIFYING TA FOR SITE AND WORK CHARACTERISTICS Consider supplementary notes provided by the MUTCD or state/local guidance Example Plans in TTCP Selection Software Determine how the field conditions vary from the scenario depicted in the TA or example plan Consider the unique characteristics of urban work zones Use professional judgment URBAN WORK ZONES 44

45 STEP 4: DEVELOP TEMPORARY TRAFFIC CONTROL PLAN Temporary traffic control plans may include: Detailed schematic of TTC Instructions for field personnel Project coordination strategies Urban WZ s may be a significant project and require additional TMP components URBAN WORK ZONES 45

46 STEP 5: MODIFY BASED ON FIELD CONDITIONS Fixed objects Existing signs Sight distance issue Work vehicle storage Pedestrian Access MODULE 1: SHORT TERM WORK ZONES 46

47 TTCP DEVELOPMENT CHECKLIST Work characteristics Traffic characteristics Geometrics and work location Checklist Handouts URBAN WORK ZONES 47

48 URBAN WORK ZONE CHECKLIST WORK SITE CHARACTERISTICS CHALLENGES THAT REQUIRE FIELD ADJUSTMENT POSSIBLE MITIGATION STRATEGIES Work on travelway Work interferes with crosswalk/sidewalk Work on travelway requiring lane closure Driveway access Turning movement at intersection Lane closure interfere with land access Pedestrian facility continuity Pedestrian crossing interruption Traffic congestion and unacceptable level of service (LOS) Use flagger Turning movement prohibition Use of alternate access where feasible Use guide signs for alternate access Use of self-regulating TCDs for low volume roads Advance warning for lane closure, turn prohibition Sidewalk detour ADA compliant Portable barrier Pedestrian detour signs ADA compliant Consider advance warning Peak hour reopening to traffic Plan for off-peak work Consider staged operation Night work 48

49 URBAN WORK ZONE CHECKLIST WORK SITE CHARACTERISTICS Presence of grade/ horizontal curve CHALLENGES THAT REQUIRE FIELD ADJUSTMENT Sight distance problem due to grade POSSIBLE MITIGATION STRATEGIES Move lane closure taper to top of vertical curve Use arrow board Extend work zone Sight distance problem at horizontal curve Provide lane closure taper and arrow board at the tangent section Lane closure Sight distance problem due to roadside fixed objects Move taper forward (upstream) Increase longitudinal buffer Visual clutter due to existing signs and billboards Use portable changeable message signs Traffic control devices (signs) with orange flags Extend work zone to avoid visual clutter Work space adjacent to sidewalk Separating pedestrian traffic from work space Pedestrian detour Portable barriers Pedestrian route guidance signs 49

50 SIGNIFICANT PROJECTS Due to the Rule on Work Zone Safety and Mobility, operations which are deemed significant projects require: Temporary Traffic Control Plan Public Information Strategies Transportation Operations Strategies Significant projects defined as: Section of the Rule defines a significant project as one that, alone or in combination with other concurrent projects nearby, is anticipated to cause sustained work zone impacts that are greater than what is considered tolerable based on State policy and/or engineering judgment. All Interstate system projects within the boundaries of a designated Transportation Management Area (TMA) that occupy a location for more than three days with either intermittent or continuous lane closures shall be considered as significant projects. 50

51 URBAN WORK ZONE EXAMPLES Temporary Traffic Control Plans 51

52 LANE SHIFT WITH PARKING LANE Closed utilizing a taper length of 1/3L Provide Type 3 Barricades or other channelizing devices to divert traffic to and from parking lanes Prohibition and availability of parking should be well marked at both ends Shield work area from errant vehicles Provide longitudinal buffer MODULE 1: SHORT TERM WORK ZONES 52

53 EARLY CLOSURE OF RIGHT LANE WITH MULTIPLE DRIVEWAYS Early closure helps traffic to early merge Alleviates access-related concerns Right turning traffic Use Type 3 Barricades as shown Optional arrow board shown on this plan improve WZ recognition MODULE 1: SHORT TERM WORK ZONES 53

54 CLOSURE OF LEFT TWO LANES IN URBAN WORK ZONE Lane closure creates driveway access problem Use Type 3 Barricades with arrow boards (optional). Prohibit turns as necessary Access to adjacent land Left turn out of driveways. Check left turn queue build-up MODULE 1: SHORT TERM WORK ZONES 54

55 WORK ON FAR RIGHT LANE NEARBY INTERSECTION WITH EARLY CLOSURE Early closure of the right lane is desirable High right turn volumes at the intersection may require an alternate solution Provide Road Work Ahead signage on all four approaches. No Turn on Red sign on right side approach is desirable Prohibited left turn at the affected driveway Sight distance issue MODULE 1: SHORT TERM WORK ZONES 55

56 SIDEWALK CLOSURE INVOLVING MINOR STREET IN URBAN AREA WZ may require closing or relocating pedestrian facilities Accessibility features must be maintained Use barriers to shield pedestrians While only the TTC for pedestrians are shown in this example, additional devices will be required for vehicular traffic MODULE 1: SHORT TERM WORK ZONES 56

57 PEDESTRIAN FACILITY REROUTED INTO TRAVELED LANES WZ may require rerouting of pedestrian facilities Consider rerouting these facilities into the traveled way Mobility impact on the existing traffic system must be considered Shielding the pedestrian facility from the traffic key consideration MODULE 1: SHORT TERM WORK ZONES 57

58 LANE CLOSURE WITH BICYCLE LANE Bicycle lanes must be considered when developing TTCP Rightmost lane is utilized as an exclusive right turn lane with the closure on the far side of the intersection Use Share the Road bicycle signage located upstream of the closure MODULE 1: SHORT TERM WORK ZONES 58

59 SHOULDER CLOSURE ON URBAN LOCATION TO ACCOMMODATE BICYCLISTS WZ may interrupt bicycle facilities at mid-block locations Ensure adequate lane width for bicyclists and motorists to drive side by side, otherwise: California MUTCD recommends Bicyclists May Use Full Lane sign Crash cushion, barrier and lights appropriate for long-term work zone scenarios Place advance warning signs so path of travel for bicyclists open and conspicous MODULE 1: SHORT TERM WORK ZONES 59

60 OTHER RESOURCES Further information on highway work zone safety can be found through the following organizations: American Road and Transportation Builders Association: American Traffic Safety Services Association: Federal Highway Administration: Institute of Transportation Engineers: Manual on Uniform Traffic Control Devices: National Highway Institute: National Work Zone Safety Information Clearinghouse: Occupational Safety and Health Administration: Texas Transportation Institute: Transportation Research Board: URBAN WORK ZONES 60

61 TRAFFIC CONTROL STRATEGIES FOR SHORT- TERM, SHORT-DURATION, AND MOBILE WORK ZONES Training Program FHWA GRANT DTFH61-11-RA

62 DISCLAIMER Opinions, findings, and conclusions expressed in this presentation are those of contractors and not necessarily those of USDOT or FHWA Materials prepared under contract with FHWA Content is living and subject to change SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 62

63 OUTLINE Background Purpose and Objectives Unique characteristics of Short-Term, Short- Duration, and Mobile (STSDM) Work Zones Temporary traffic control strategies Steps for TTC plan development Example plans SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 63

64 BACKGROUND Aging infrastructure = More work zones Two primary work zone objectives: Maintain safety Maintain acceptable levels of mobility Objectives don t necessarily go hand-in-hand Careful planning, design, and implementation of work zone is key SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 64

65 THE MUTCD MUTCD Chapter 6 Temporary traffic control (TTC) for work zones, incidents, etc. Typical Applications (TAs) of common work zone TTC scenarios Adjust TAs to fit actual conditions What aspects may be modified? Under what conditions? SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 65

66 PURPOSE AND NEED MUTCD gives limited TA modification guidance Need for additional detail beyond the MUTCD This training session provides: Issues to expect with STSDM Strategies to address these issues How to select and modify a TA Examples of modified traffic control plans SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 66

67 MUTCD WORK DURATIONS COVERED HERE Short-term stationary occupies location >1 hr within a single daylight period Short-duration occupies location 1 hr Mobile moves intermittently or continuously SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 67

68 MUTCD WORK DURATIONS NOT COVERED HERE Intermediate-term stationary occupies location 1-3 days (daytime work) or >1 hr (nighttime work) Long-term stationary occupies location >3 days SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 68

69 OTHER GUIDELINES AND TRAINING Other guidelines/training developed under this grant Urban Work Zone TTC Utility Work Zone TTC Temporary Traffic Control Plan Selection Software SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 69

70 CONCERNS WITH SHORTER DURATIONS Primary concern noted in MUTCD: It often takes longer to set up and remove the temporary traffic control zone than to perform the work. Workers face hazards in setting up and taking down the temporary traffic control zone. Also, since the work time is short, delays affecting road users are significantly increased when additional devices are installed and removed 2009 Federal MUTCD Paradox Don t put workers at risk with lengthy TTC setup Don t compromise safety by using inadequate TTC setup How can we minimize worker exposure while providing adequate TTC? 70

71 CHARACTERISTICS AND ISSUES Short-Term, Short-Duration, and Mobile Work Zones 71

72 OVERVIEW STSDM work possesses unique characteristics Typically related to the nature of the work Issues must be addressed during TTC layout UPCOMING SLIDES Characteristics and associated issues LATER ON Methods for addressing issues with appropriate TTC SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 72

73 UNIQUE CHARACTERISTICS OF STSDM 1. The work may be unanticipated and/or urgent 2. Setup and removal of TTC may take longer than the actual work 3. The work may involve constant or intermittent movement 4. Specialized vehicles or equipment may be utilized 5. Accessibility issues may occur SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 73

74 1. UNANTICIPATED OR URGENT WORK Certain events require immediate attention: Utility failures or damage Fallen trees or branches Traffic signal failures Damaged signs Damaged guardrail/barriers Localized pavement failures SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 74

75 1. UNANTICIPATED OR URGENT WORK Crews must quickly mobilize to perform the fix Little time for preparation TTC aspects may be overlooked Adequate advance notification may not be possible Drivers will not expect work zone Agencies may not be prepared Police Fire/rescue Transit SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 75

76 2. VERY SHORT DURATION WORK Some work zones take longer to setup than the actual work Single setup Moving work area with several stops Examples: Tree trimming Debris clearing Localized pavement maintenance Surveying Graffiti removal from signs Pavement markings (stop lines, legends) SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 76

77 2. VERY SHORT DURATION WORK Minimize TTC setup and removal time Minimize delays and worker exposure Ensure adequate TTC regardless of duration Tendency to become complacent as duration decreases Drivers will not expect such short duration work Simplification of TTC is key SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 77

78 3. CONTINUOUS OR INTERMITTENT MOVEMENT Continuous movement examples (in vehicle): Roadway striping Certain paving operations Street sweeping Mowing Intermittent movement examples (on foot or in vehicle): Pavement crack or joint sealing Pothole filling Debris cleaning after a storm Storm drain cleaning SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 78

79 4. SPECIALIZED VEHICLE OR EQUIPMENT Specialized equipment is often necessary to minimize the work duration and/or provide worker protection Striping trucks Aerial lift trucks Pavers Convoys These vehicles may require special TTC when in use SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 79

80 5. ACCESSIBILITY ISSUES Although STSDM work period is short, it may still impact: Pedestrians Bicyclists Access to homes and businesses On-street parking Public transit stops Users may not know how to proceed if access is blocked Workers should be prepared to deal with these issues SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 80

81 TRAFFIC CONTROL STRATEGIES Short-Term, Short-Duration, and Mobile Work Zones 81

82 TRAFFIC CONTROL STRATEGIES Unique issues may be addressed through proper TTC strategies Specific guidance is provided relating to: 1. Minimizing time to setup and remove TTC 2. Managing TTC for unexpected or emergency work 3. Managing constant or intermittent movement 4. Maintaining access to intersections, driveways, and parking 5. Accommodating pedestrians and non-motorized users 6. Temporary re-opening of travel lanes 7. Providing positive guidance 8. Accommodating special vehicles (striping trucks, aerial lifts) SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 82

83 1. MINIMIZING TIME FOR SETUP/REMOVAL As work duration decreases, so should TTC setup time Minimize worker exposure Minimize delays Methods to minimize TTC setup time: Reduce the number of TCDs Not cover/remove permanent TCDs Reduce spacing of channelizing TCDs Use lightweight signs and channelizing devices Certain criteria must be met SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 83

84 1. MINIMIZING TIME FOR SETUP/REMOVAL DOMINANT DEVICE EXAMPLES Dominant vehicle-mounted devices may replace TTC devices for certain short-duration or mobile operations High-intensity rotating, flashing, oscillating, or strobe lights Does NOT include hazard flashers Arrow boards or PCMS Retro-reflective markings on appropriately colored vehicles SHORT TERM WORK ZONES 84

85 1. MINIMIZING TIME FOR SETUP/REMOVAL ELIGIBLE CASES FOR DOMINANT DEVICES Short-duration shoulder work No lane encroachment -> Signs and channelizing devices may be omitted Lane encroachment -> Taper and channelizing devices may be omitted if shadow vehicle used Short-duration intersection work Channelizing devices may be omitted Short-term/short-duration work beyond shoulder Signs and channelizing devices may be omitted Consider other short-duration work on case-by-case basis SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 85

86 1. MINIMIZING TIME FOR SETUP/REMOVAL ALTERNATIVES TO COVERING PERMANENT TCDS Permanent signs/markings may provide conflicting messages As work duration decreases, covering devices is not practical Use high visibility devices which emphasize proper path Short-term work Use channelizing devices with closer spacing Spacing (in feet) = 0.5*speed (in mph) Taller cones (42 inches or greater) may be used in lieu of drums Short duration/mobile work No additional action necessary SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 86

87 2. MANAGING URGENT/UNEXPECTED WORK Little time to plan/prepare for work zone setup Details of site condition may be limited Full compliment of TCDs may not be readily available Use available devices until situation can be assessed React/respond to field conditions Expand/move TTC as needed Modify TTC if work takes longer than expected Temporary reopening Nighttime work Overnight shutdown SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 87

88 3. MANAGING CONTINUOUS MOVEMENT - USING FULLY MOBILE TRAFFIC CONTROL Often not practical to provide stationary TTC for Advance warning messages Channelization MUTCD allows for dominant, vehicle-mounted TTC in lieu of stationary TTC devices PCMS or Static Signs Arrow Boards High-intensity rotating, flashing, oscillating, or strobe lights SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 88

89 3. MANAGING INTERMITTENT MOVEMENT - MOBILE VS. STATIONARY TRAFFIC CONTROL Moving short-duration operations Some may be more well-suited for complete mobilization of TTC Others may move so slowly that retrieving stationary devices is more efficient Considerations for mobile vs. stationary work zone setup: Duration of each stop Time and distance between stops Speed of the work zone while in motion Overall distance covered by the operation during the work period Speed and volume on the roadway SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 89

90 3. MANAGING MOVING WORK ZONES - VEHICLE CONVOYS A convoy of multiple vehicles may be necessary Typically use shadow vehicle especially at high speeds or volumes Some operations require multiple vehicle convoy Work convoys may provide several distinct advantages: Additional protection of workers Enhanced work zone conspicuity Extended work area provides additional time for materials to dry Staggering of vehicles allows for more effective channelization SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 90

91 3. MANAGING MOVING WORK ZONES - CAUTION WITH MOBILE CONVOYS Protect convoy against unsafe passing and errant vehicles: Buffer spaces and shielding Truck-mounted arrow boards or PCMS Truck-mounted attenuators Proper roll-ahead distances (spacing between vehicles) Pull over periodically to allow queues to pass Perform work during off-peak hours or at night SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 91

92 4. MAINTAINING ACCESS Maintain access to intersections, driveways, and on-street parking if possible Driveway/intersection closure Consider the development of queues Use flaggers Divert to an alternative entry point if possible Signed detours are impractical for such a short work period On-street parking closure Minimize the number of stalls closed in high-demand areas Ensure shielding of workers with devices and buffer spaces Special attention prior to work zone if metered SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 92

93 5. ACCOMMODATING PEDS, BIKES & TRANSIT Identify presence of peds, bikes, and transit stops in work zone Determine how work activity will impact ped/bike movement Sidewalks/crosswalks ADA accommodation Bike lanes/paths Transit stops Use TCDs to provide safe diversion route Even for short-duration operations Separate motorized and non-motorized traffic streams SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 93

94 6. TEMPORARY RE-OPENING OF TRAVEL LANES Peak period lane restrictions Planned maintenance may be restricted to off-peak Re-open affected travel lanes during peak periods If work is not complete: Move work crews, equipment, and devices off the roadway Cover or shield of any holes or other defects in the pavement. Maintain appropriate TCDs to alert of remaining hazards/defects Work may be finished after peak period SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 94

95 7. PROVIDING POSITIVE GUIDANCE Road users will be often unaware of STSDM work zones Effective positive guidance becomes even more critical Draw attention to work zone Dominant high intensity vehicle lighting PCMS Provide taper and lane designation guidance along with prohibition/closure Channelizing devices Arrow boards SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 95

96 8. USING AERIAL LIFT TRUCKS Aerial trucks (bucket trucks, cherry pickers, or scissor lifts) are commonly used in STSD work zones Often require specialized TTC Refer to state and local standards NEVER extend a bucket over an active traffic stream Use flaggers to close lanes if necessary Use TMA at non-intersection locations SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 96

97 TEMPORARY TRAFFIC CONTROL PLAN DEVELOPMENT Short-Term, Short-Duration, and Mobile Work Zones 97

98 98 TTCP DEVELOPMENT GENERAL STEPS 1. Collect necessary characteristics about the site and work scenario 2. Determine appropriate TA for scenario 3. Modify TA based on unique characteristics of STSDM work 4. Develop appropriate TTCP 5. Review and modify TTC in the field as necessary

99 STEP 1: OBTAIN SITE & WORK CHARACTERISTICS Site Characteristics Geometric characteristics (lane width, number of lanes, etc.) Existing traffic control (placement of devices, posted speed limit, etc.) Traffic characteristics (both motorized and non-motorized) Environmental or other surrounding characteristics Work Characteristics Proposed work activity Proposed work duration (including upper and lower bounds) Necessary workers, vehicles, and equipment Additional special considerations SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 99

100 STEP 2: SELECT APPROPRIATE TYPICAL APP. Select appropriate Typical Application from the MUTCD Consider state MUTCDs, standard plans, local regulations TA or Example Plan from the TTCP Selection Software Selecting a TA or Example Plan is NOT the last step Must be modified to fit actual field conditions, as well as specific characteristics of the work SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 100

101 STEP 3: MODIFY TA FOR SITE AND WORK CHARACTERISTICS Consider supplementary notes provided by the MUTCD or state/local guidance Also included for Example Plans in TTCP Selection Software Consider how the field conditions vary from the scenario depicted in the TA Consider the unique characteristics of STSDM work zones Apply strategies outlined within this training SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 101

102 STEP 4: DEVELOP TTCP Lack of adequate planning time for urgent work may limit ability to develop complete TTCP Should include: Detailed schematic of TTC Instructions for field personnel Project coordination strategies These types of work zones will typically not require the additional components or regulations that apply to longer duration work zones SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 102

103 STEP 5: MODIFY BASED ON FIELD CONDITIONS Site conditions may be different than anticipated Work area may be larger/smaller than expected Additional workers, equipment, or vehicles may be needed Unexpected access issues may arise Modify TTC throughout duration as conditions change SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 103

104 TTCP DEVELOPMENT CHECKLIST Work characteristics Traffic characteristics Geometrics and work location Checklist Handouts SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 104

105 SHORT-TERM WORK ZONE CHECKLIST WORK SITE CHARACTERISTICS CHALLENGES THAT REQUIRE FIELD ADJUSTMENT POSSIBLE MITIGATION STRATEGIES Work on traveled way Work in crosswalk or on sidewalk Driveway access Turning movement at intersection Lane closure interferes with land access Pedestrian facility continuity Use flagger Turning movement prohibition Use of alternate access where feasible Use of self-regulating TCDs for low volume roads Advance warning for lane closure, turn prohibition Sidewalk detour ADA compliant Portable barrier Pedestrian crossing interruption Pedestrian detour signs Work on traveled way requiring lane closure Traffic congestion and unacceptable level of service Consider advance warning Peak hour break for work Plan for off-peak work Sight distance problem due to grade Move lane closure taper to top of vertical curve Use arrow board Presence of grade/ horizontal curve Sight distance problem at horizontal curve Provide lane closure taper and arrow board at the tangent section 105

106 SHORT-DURATION WORK ZONE CHECKLIST WORK SITE CHARACTERISTICS CHALLENGES THAT REQUIRE FIELD ADJUSTMENT POSSIBLE MITIGATION STRATEGIES Work beyond shoulder Work vehicle placement Work vehicle with dominant light Work vehicle with mounted arrow panel Lane closure with TCD if work vehicle on shoulder/travel lanes Work on shoulder Interrupts sidewalk Provide sidewalk detour signs (portable) Work on traveled way - At or near intersection Work vehicle on traveled way Lane protection by TCD Lane protection by flagger Provide advance warning as appropriate 106

107 MOBILE WORK ZONE CHECKLIST WORK SITE CHARACTERISTICS CHALLENGES THAT REQUIRE FIELD ADJUSTMENT POSSIBLE MITIGATION STRATEGIES Workers on foot Must properly protect field workers on foot Work/shadow vehicle with dominant devices, arrow panel High-speed traffic High-traffic volumes Increased potential for errant vehicles and/or higher-speed collisions Increased potential for errant vehicles and/or formation of queues Temporary rumble strips Shadow vehicle(s) with warning devices Dominant devices Arrow panel Consider staging of construction Off-peak period work Shadow vehicle(s) Portable changeable message sign Arrow board Lack of paved shoulders Shadow and/or work vehicles often are intended to travel along shoulder Consider staging of construction Off-peak period work Shadow vehicle(s) Portable changeable message sign Arrow board 107

108 MOBILE WORK ZONE CHECKLIST WORK SITE CHARACTERISTICS Roadway includes significant horizontal and/or vertical curvature Work includes closure of multiple lanes Roadway includes high frequency of intersections and/or driveways CHALLENGES THAT REQUIRE FIELD ADJUSTMENT Reduces sight distance or may impact vehicle stopping distance Errant vehicle entering convoy Vehicles entering/exiting the traffic stream from additional access point POSSIBLE MITIGATION STRATEGIES Use dominant devices Position shadow vehicles with arrow board for visibility Off-peak work Consider staged work Shadow vehicle(s) Dominant service arrow panel Shadow vehicle(s) Roadway includes significant pedestrian and/or bicycle traffic Pedestrian and bicycle intrusion Pedestrian detour signs ADA ramps Work expected to be performed during peak period Peak period congestion Detour 108

109 SHORT-TERM WORK ZONE EXAMPLES Temporary Traffic Control Plans 109

110 SHORT-TERM WORK ZONES Work that occupies a location for more than 1 hour within a single daylight period Some ambiguity between definition of short-term and short-duration work zones Utility work zones Various highway maintenance operations Asphalt pavement patching and preventative maintenance operations Traffic signal maintenance SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 110

111 ASPHALT PATCHING ON MULTI-LANE DIVIDED HIGHWAY Asphalt paving operations are a common short-term work zone Consider roll-ahead distances of work/shadow vehicles equipped with TMAs Use taller (42 ) cones instead of barrels Keep vehicles and equipment to one side if possible Never assume shoulders are safe work areas

112 MAINTENANCE OPERATION NEAR SIGNALIZED INTERSECTION May include maintenance of signal, sign, detector Truck-mounted attenuator is optional Use high-intensity warning lights on work vehicles to provide 360 o warning Advance warning signs should be on portable stands to reduce setup time NEVER extend a bucket over an active traffic stream 112

113 UTILITY WORK ON TWO-LANE HIGHWAY Flagger control is necessary due providing only a single lane Reduce setup time Portable warning signs Taller (42 ) cones instead of barrels Optional buffer spaces help reduce risks to highway workers due to errant vehicles

114 MAINTENANCE WORK NEARBY INTERSECTION ON LOW-VOLUME ROADWAY Note the optional pavement markings and devices Likely inefficient for this application for short-term work Type 3 Barricade is required Road users must be able to see approaching vehicular traffic beyond the work site in order to safely yield Volume must be low enough for sufficient gaps to exist for yielding traffic

115 SHORT-DURATION WORK ZONE EXAMPLES Temporary Traffic Control Layout 115

116 SHORT-DURATION WORK ZONES Work that occupies a location up to one hour Traffic signal maintenance Pavement patching or other repair operations Surveying operations Bridge or other highway element inspections Loading or unloading equipment or other pre-work operations Utility work zones Tree trimming operations SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 116

117 117 SHORT-DURATION TRAFFIC SIGNAL MAINTENANCE Use high-intensity warning lights and retroreflective markings on work vehicles to provide 360 o warning 10 feet of paved traveled way must remain Advance warning signs should be on portable stands to reduce setup time NEVER extend a bucket over an active traffic stream

118 SURVEYING OPERATION Centerline: Cones should be placed 6-12 on either side of the centerline Shoulder: Flaggers may be omitted DO NOT assume shoulders areas are automatically safe Consider: BE PREPARED TO STOP signs High-level warning devices to protect the survey equipment

119 TREE TRIMMING OPERATIONS DO NOT assume shoulders areas are automatically safe work areas Use additional traffic control if necessary to prevent falling limbs from injuring workers, pedestrians or motorists Consider the optional lateral buffer space for this application Traffic cones should be utilized as channelizing devices instead of barrels

120 120 MID-BLOCK MAINTENANCE OPERATION Examples include tree trimming or utility work Truck-mounted attenuator is optional Include on high speed and/or high volume roadways Advance warning signs should be on portable stands to reduce setup time 10 feet minimum lane width is required to maintain travel in the lane adjacent to the work area NEVER extend the bucket over an active traffic stream

121 FREEWAY MAINTENANCE OPERATION Consider joining several short-duration work areas together into a single stationary work zone of longer duration For example, reducing several lane or shoulder closures over a larger area to a single closure Separate arrow boards must be used for each closed lane

122 MOBILE WORK ZONE EXAMPLES Temporary Traffic Control Layout 122

123 MOBILE WORK ZONES Work that moves intermittently or continuously Sweeping, debris removal, or other cleaning activities Pavement marking installation or removal Asphalt cold patching operations Rumble strip installation Various preventative maintenance operations SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 123

124 MOBILE OPERATION ON SHOULDER Vehicle mounted signs must not be obscured by equipment or supplies Arrow board is optional Caution mode must be used! Vehicle s hazard warning lights not acceptable alone High-intensity rotating, flashing, oscillating, or strobe lights required MODULE 1: SHORT TERM WORK ZONES 124

125 MOBILE STRIPING OPERATION Both shadow and work vehicles SHALL display high-intensity rotating, flashing, oscillating, or strobe lights Truck-mounted PCMS may be used in lieu of arrow boards WET PAINT / KEEP RIGHT Work convoy should pull over to allow vehicles to pass WHERE PRACTICAL DO NOT PASS signs should be used otherwise Arrow panel facing oncoming traffic is OPTIONAL but recommended 125

126 MULTI-LANE MOBILE OPERATION Space between vehicles should be minimized to deter road users from driving in between convoy Work should be performed during off-peak daylight hours if possible Truck-mounted attenuators are required for shadow vehicles in traveled way Optional for vehicle in shoulder/work vehicle Arrow boards shall be used for freeway lane closures One arrow board for each lane MODULE 1: SHORT TERM WORK ZONES 126

127 OTHER RESOURCES Further information on highway work zone safety can be found through the following organizations: American Road and Transportation Builders Association: American Traffic Safety Services Association: Federal Highway Administration: Institute of Transportation Engineers: Manual on Uniform Traffic Control Devices: National Highway Institute: National Work Zone Safety Information Clearinghouse: Occupational Safety and Health Administration: Texas Transportation Institute: Transportation Research Board: SHORT TERM, SHORT-DURATION, AND MOBILE WORK ZONES 127

128 TEMPORARY TRAFFIC CONTROL PLAN SELECTION SOFTWARE FHWA GRANT DTFH61-11-RA

129 DISCLAIMER Opinions, findings, and conclusions expressed in this presentation are those of contractor(s) and not necessarily those of USDOT or FHWA Was prepared in cooperation with USDOT and FHWA The Temporary Traffic Control Plan Selection Software is a Living Document and may be modified and updated as needed TTCP SOFTWARE 129

130 PURPOSE Training Program for Temporary Traffic Control Plan Selection Software Applicable for: Safety Professionals Highway Workers State and Local Road Agencies Permit Granting Agencies TTCP SOFTWARE 130

131 INTRODUCTION SAFETEA-LU (2005) FHWA Work Zone Safety Grant Program 2006 Work Zone Safety Grant WSU - Utility Work Zone TTCP Software Tool 2011 Work Zone Safety Grant WSU - Development of Comprehensive Tool TTCP SOFTWARE 131

132 FEDERAL MUTCD AND PART 6 Part 6 of the MUTCD Temporary Traffic Control Guidance, Standards, Devices, etc MUTCD Includes 46 Typical Applications TTCP SOFTWARE 132

133 46 MUTCD TYPICAL APPLICATIONS Cover a variety of situations commonly encountered Not every possible situation can be addressed Some scenarios require combining components of two or more typical applications For example: Closure at the Side of an Intersection (TA-27) WITH Sidewalk Detour or Diversion (TA-28) TTCP SOFTWARE 133

134 134 EXAMPLE TYPICAL APPLICATION 28 Typical applications include: Necessary Temporary Traffic Control Devices Signs Channelizing Devices Optional Devices Dimensions for TTC Layout Placement of Advance Warning Devices Taper Lengths Spacing Between Channelizing Devices Special Notes

135 SUPPLEMENTARY NOTES

136 STATE AND LOCAL STANDARDS 2009 National MUTCD minimum national standard for all facets of temporary traffic control States must either: Adopt National MUTCD Adopt National MUTCD with State Supplements Adopt State MUTCD in substantial conformance with 2009 National edition National MUTCD is the minimum standard State-level MUTCD or supplement may be more rigorous TTCP SOFTWARE 136

137 MUTCD BY STATE

138 GAPS IN TYPICAL APPLICATIONS Only 46 Typical Applications DO NOT cover all of the frequently encountered work zone scenarios Can be incorrectly implemented As Is TA s must be tailored to the specific work zone scenario encountered Rarely verbatim the same as generalized scenario shown in TA TTCP SOFTWARE 138

139 EXAMPLE PLANS WSU-TRG developed 72 Example Plans Supplement the existing 46 TAs Cover many additional work zone scenarios that are frequently encountered Based on state of the art and practice in highway work zones Best practices in individual states Up to date research literature Reviewed by the FHWA, national focus group, and experienced professional work zone consultant TTCP SOFTWARE 139

140 TEMPORARY TRAFFIC CONTROL SELECTION SOFTWARE Combination of: 46 Typical Applications from 2009 MUTCD 72 additional example plans State-specific standard drawings Separated into EIGHT distinct modules Users navigate flow chart logic to arrive at appropriate plan Additional drop down menus for site-specific information TTCP SOFTWARE 140

141 TTCP MODULES

142 STATE-SPECIFIC WORK ZONE MODULE Comprehensive list of the plans available for each state Should always be checked first for appropriate state-level plans Standard plans are updated periodically by WSU-TRG

143 STATE-SPECIFIC EXAMPLE Assuming that the State of Florida is selected:

144 STATE-SPECIFIC EXAMPLE Returns User to Work Zone Safety Homepage Link to the Individual State s Standard Plans Page Most Recent Update of State Plans Each state s standard plans are categorized in the same manner in which they are presented on their website, including All Standard Plans which includes every standard plan

145 STATE-SPECIFIC EXAMPLE Clicking any one of the links will direct the user to a PDF of that plan 145

146 STATE-SPECIFIC EXAMPLE Remember to always check for state-specific versions of the work zone scenario!

147 ADDITIONAL STATE EXAMPLES Selecting a specific category will filter the results TTCP SOFTWARE 147

148 ADDITIONAL STATE EXAMPLES Clicking any one of the links will direct the user to a PDF of that plan TTCP SOFTWARE 148

149 ADDITIONAL STATE EXAMPLES Remember to always check for state-specific versions of the work zone scenario! TTCP SOFTWARE 149

150 ADDITIONAL STATE EXAMPLES Selecting a specific category will filter the results TTCP SOFTWARE 150

151 ADDITIONAL STATE EXAMPLES Selecting intersection will provide the plans related to intersections in Florida Clicking any one of the links will direct the user to a PDF of that plan TTCP SOFTWARE 151

152 ADDITIONAL STATE EXAMPLES Remember to always check for state-specific versions of the work zone scenario! TTCP SOFTWARE 152

153 ADDITIONAL STATE EXAMPLES Selecting a specific category will filter the results TTCP SOFTWARE 153

154 ADDITIONAL STATE EXAMPLES Selecting other will provide the plans which are not specifically categorized from Florida Clicking any one of the links will direct the user to a PDF of that plan TTCP SOFTWARE 154

155 ADDITIONAL STATE EXAMPLES Some items in the state-specific module may include summary tables or notes Some plans or items may involve multiple page PDFs In general, each state s list will contain all of the standard plans, typical applications and notes from that state TTCP SOFTWARE 155

156 UTILITY WORK ZONE MODULE Example plans originally developed as a part of 2006 FHWA Work Zone Safety Grant Similar to Typical Application counterpart in the MUTCD Temporary traffic control devices geared towards utility work zones Short or intermediate term operations Still compliant to National MUTCD TTCP SOFTWARE 156

157 UTILITY WORK ZONE MODULE Clicking an object in the flow chart will skip to that portion of the logic Advance through flow chart logic to appropriate TTCP Users will be re-directed to the appropriate module as necessary TTCP SOFTWARE 157

158 UTILITY WORK ZONE MODULE Once an object is clicked on any flowchart, the user will be prompted with questions about the roadway and work site in question TTCP SOFTWARE 158

159 QUICK EXAMPLE Suppose a TTCP is required for the following utility work zone: Utility work on shoulder of a two lane roadway Work does not encroach onto roadway Urban roadway with 45 MPH posted speed limit Moderate traffic volumes 11 wide travel lanes with 3 paved shoulders TTCP SOFTWARE 159

160 PROGRESSING THROUGH THE FLOW CHART Begin at the Main Module of the TTCP Software Since this is a Utility Work Zone, the Utility Work Zone Module should be selected TTCP SOFTWARE 160

161 PROGRESSING THROUGH THE FLOWCHART This will lead to the Utility Work Zone Module where all plans relevant to utility work zones will be found The user may either answer every question in the logic or skip ahead by clicking the appropriate question object TTCP SOFTWARE 161

162 QUESTION OBJECTS The first relevant question for this example involves the location of the utility work Given that we know the work in question is taking place on the shoulder only, selecting On Shoulder is appropriate 162

163 SUB-MODULES In addition to the eight modules of the software, there are many sub-modules for specific roadway scenarios Utility Work Zone On Shoulder Sub-Module Introduce a new flowchart specific to that roadway scenario Given that we know the work is taking place on a two-lane roadway and does not have low volumes and low speed, Figure D3 is the most appropriate TTCP

164 DYNAMIC QUESTIONS Additional information about the work being performed or roadway conditions may be necessary after the appropriate plan is selected This information can be entered via the drop down menus TTCP SOFTWARE 164

165 DISPLAY OF TTCP A table will be shown which displays the appropriate dimensions for the layout of TTCDs The appropriate plan will be displayed on screen, including all required devices Buttons are included at the top which allow the user to: Return to Work Zone Safety Homepage, the Main Module, or the previous module A display of the legend/symbols Printing and zoom functions

166 INTERSECTION MODULE Includes typical applications and example plans appropriate for use in the vicinity of highway intersections Incorporates the Roundabout Work Zone sub-module, including example plans developed specifically for roundabouts Not covered in the 46 TAs TTCP SOFTWARE 166

167 INTERSECTION EXAMPLE Suppose a TTCP is required for a signalized intersection: Two approach lanes in the direction where the work is occurring Work on the far side of the intersection in the left lane Urban area with 40 MPH posted speed limit No shoulder with 11 foot wide travel lanes Work will interfere with the crosswalk TTCP SOFTWARE 167

168 INTERSECTION EXAMPLE Following through the flow chart logic within the Intersection Module, the user will be directed to dynamic questions page for TA 6H-23 Enter the additional work and site characteristics to determine the appropriate plan TTCP SOFTWARE 168

169 INTERSECTION EXAMPLE A button is included which will display the typical application for pedestrian detours since crosswalks are affected 169

170 ROUNDABOUT EXAMPLE The Roundabout Module can be found within the intersection module Suppose a TTCP is required for a single-lane roundabout with the following characteristics: Urban roadway with 40 MPH posted speed limit 11 feet wide travel lanes with no shoulders 7 foot closure within the circulating lane TTCP SOFTWARE 170

171 ROUNDABOUT EXAMPLE A button is included which will display the typical application for roundabout detour due to the closure

172 MOBILE WORK ZONE MODULE Includes typical applications and example plans specific to mobile work zone operations Generalized plan for mobile striping operations not included in the MUTCD Expansion of TA 6H-35 for two and three lane scenarios TTCP SOFTWARE 172

173 WORK ZONE DETOUR MODULE Includes the typical applications for detours required for various types of highway work zone scenarios Specific plans are included for roundabouts and pedestrians detours as necessary within the software TTCP SOFTWARE 173

174 FREEWAY WORK ZONE MODULE Includes typical applications and example plans specific to operations taking place on the freeway Example plans greatly expand on the variety of possible roadway geometries and work locations involved in freeway operations beyond the MUTCD TTCP SOFTWARE 174

175 FREEWAY EXAMPLE Suppose a TTCP is required for shoulder work on an urban freeway Left shoulder work (median side) 6 feet wide shoulder with 12 feet wide travel lanes Complete closure of shoulder 70 MPH posted speed limit Within the Freeway Module, shoulder only work can be selected TTCP SOFTWARE 175

176 FREEWAY EXAMPLE Whenever an example plan is shown, a disclaimer will indicate that the plan is not a TA from the MUTCD

177 TWO-LANE WORK ZONE MODULE Includes typical applications and example plans specific to operations taking place on two-lane roadways Example plans for haul roads beyond TA 6H- 14, for long-term and short-term scenarios TTCP SOFTWARE 177

178 MULTI-LANE WORK ZONE MODULE Includes typical applications and example plans specific to operations taking place on multi-lane highways Does not cover work zone scenarios beyond three lanes in one direction Specific plans for short, intermediate, and long term scenarios TTCP SOFTWARE 178

179 MULTI-LANE EXAMPLE Suppose a TTCP is required for a multi-lane highway which includes a two-way left turn lane Five foot closure within the two-way left turn lane Rural highway with posted speed limit of 40 MPH and 11 feet wide travel lanes Skip to the portion of the multi-lane module which relates to highways with two-way left turn lanes TTCP SOFTWARE 179

180 MULTI-LANE EXAMPLE Optional TTC may also be shown in the plan, such as the optional flaggers shown in Example Plan 32I

181 SYSTEM REQUIREMENTS Web-based software tool compatible with: Personal computers (Windows, and Apple OS) Tablets and mobile devices (ios, Android, Windows Mobile) Compatible browsers include: Mozilla Firefox Google Chrome Microsoft Internet Explorer Apple Safari TTCP SOFTWARE 181

182 WORK ZONE SAFETY HOMEPAGE WZ Home button will return the user to the homepage from any of the Work Zone Safety Grant products TTCP SOFTWARE 182

183 WORK ZONE SAFETY COMPENDIUM OF DOCUMENTS SEARCH ENGINE FHWA GRANT DTFH61-11-RA

184 DISCLAIMER Opinions, findings, and conclusions expressed in this presentation are those of contractor(s) and not necessarily those of USDOT or FHWA Was prepared in cooperation with USDOT and FHWA The Work Zone Safety Compendium of Documents Search Engine is a Living Document and may be modified and updated as needed COMPENDIUM 184

185 WORK ZONE SAFETY COMPENDIUM OF DOCUMENTS SEARCH ENGINE Workzone.eng.wayne.edu Developed as a part of the 2011 FHWA Work Zone Safety Grant Customized search engine of all documents relating to highway work zones COMPENDIUM 185

186 WORK ZONE SAFETY COMPENDIUM OF DOCUMENTS SEARCH ENGINE 186