Smarter Work Zones SWZ Program DLM Systems. Efficiency through technology and collaboration

Transcription

1 Smarter Wrk Znes SWZ Prgram DLM Systems Efficiency thrugh technlgy and cllabratin

2 Smarter Wrk Znes OVERVIEW 2

3 What are Smarter Wrk Znes? Innvative strategies designed t ptimize wrk zne safety and mbility Plicies and practices used t incrementally and cntinuusly imprve WZ peratins Tls t reduce WZ crashes and delays Tls t enhance WZ management strategies 3

4 What are Smarter Wrk Znes (cnt.)? Prject Crdinatin Crdinatin within a single prject and/r amng multiple prjects within a crridr, netwrk, r regin, and pssibly acrss agency jurisdictins Technlgy Applicatins Deplyment f Intelligent Transprtatin Systems (ITS) fr dynamic management f wrk zne traffic impacts, such as queue and speed management Tday s Fcus 4

5 Types f Technlgy Applicatins Include Real-Time Traveler Infrmatin Queue Warning Dynamic Lane Merge Incident Management Variable Speed Limits Autmated Enfrcement Entering/Exiting Cnstructin Vehicle Ntificatin Perfrmance Measurement Fr mre infrmatin check ut the SWZ TA website 5

6 Several States are already Utilizing SWZ! Over 40 states have implemented technlgy applicatins, including: Frmalizing prcesses fr planning and perating technlgy applicatins Implementing n-call reginal ITS SWZ cntracts Implementing steps twards institutinalizing technlgy: Develping systems engineering dcuments Develping specs t bid n technlgy Pilting technlgy applicatins Evaluating pilt t determine effectiveness fr wider implementatin Fully implementing technlgy applicatins Utilizing prject funds t implement ITS leading t institutinalizatin 6

7 Why Implement SWZ? Capabilities f Technlgy Applicatin Imprved driver awareness Changing traffic patterns Dwnstream cngestin Cnstructin vehicle ingress/egress Expected delay / travel time Dynamic and actinable guidance t drivers Rad wrk ahead vs Traffic Stpped 1 mile ahead Rad wrk expect delays vs. Rad Wrk I-95 past Exit 52 Use Alternate Rutes Enhanced tls fr n-site traffic management Speed mnitring Autmated speed enfrcement Queue frmatin 7

8 Why Implement SWZ? Benefits f Technlgy Applicatin Empwers drivers t be practive in respnding t wrk znes Awareness f dwnstream hazards Facilitates real-time decisin-making and trip planning Streamlines traffic management functins thrugh partial autmatin Speed enfrcement Data cllectin Perfrmance measurement Infrmatin increases custmer satisfactin The Mre yu Knw 8

9 Smarter Wrk Znes DLM SYSTEMS 9

10 Dynamic Lane Merge (DLM) Overview What is it? Systems that encurage mtrists t merge at specific pints as they apprach a lane clsure, depending n current perating cnditins Systems alternate merging strategies (early and late merge) Hw des it wrk? Uses technlgy (e.g., sensrs) t mnitr real-time traffic characteristics Cnveys instructins thrugh prtable changeable message signs (PCMS) placed in advance f a lane clsure Uses site-specific algrithm Detects a change in traffic cnditins (e.g., changes in speed, density, and ccupancy) t switch merge strategies Prvides lane use instructins t drivers 10

11 DLM Strategies Early Lane Merge Often used in lw-vlume cnditins Reduces the ccurrence f high-speed merging at the pint f lane clsure Late Zipper Lane Merge Often used in high-vlume cnditins Reduces the length f the queue 11

12 Early Lane Merge Advises drivers t mve ut f clsed lane well befre the frced merge pint Wrks best when there is a lw traffic vlume cmbined with high average speeds Benefits: Reductin f aggressive driving and unsafe merge maneuvers Prvide significant advanced warning t allw drivers adequate distance t merge Gives psitive instructins n lane usage Surce: Surce: Minnesta DOT 12

13 Late Lane Merge Advises drivers t use bth lanes up t the merge pint Wrks better fr high traffic vlumes, situatins where queueing upstream f wrk zne is expected t ccur Benefits: Maximize available strage upstream f wrk zne fr reducing ttal queue length. Reduces cnfusin between drivers wh think they shuld merge early vs. drivers that use pen lanes as far as pssible. Clarifies right-f-way at merge pint ( alternate merge ) Surce: Hallmark, Mudgal, Stut, & Wang, 2011 Surce: 13

14 Implementing DLM Where? Mst useful in wrk znes experiencing fluctuating traffic demands Hw? Techniques used t implement DLM: Micrwave signals t identify traffic vlume Vide analysis t track traffic vlume, lane ccupancy, and queue Dppler radar t determine average speed Pneumatic tubes t calculate traffic vlume Cmputer simulatins t ptimize dynamic merging algrithms Hw Much? Csts vary based n detectin technlgy, number f PCMS, and prduct manufacturer 14

15 DLM Cnsideratins Cnsideratins prir t implementing a DLM system: Sign placement Rad gemetry, expected queue length, and average expected speed Driver awareness with radway Entrance/exit ramp prximity t merging area Plice enfrcement Prven useful, especially with early merge Fcus n reducing aggressive, nn-cmpliant drivers Outreach methds Driver cnfusin and steep learning curve Public infrmatin campaigns n lane clsures and hw DLM systems wrk Cnsideratins during implementatin: Ensure signs are displaying reasnable messages Engage in real-time sign feedback 15

16 Benefits f Using DLM Reductins in speed differentials between pen lanes in advance f the lane clsure Reduced driver frustratin by creating a sense f fairness Reductin in queue lengths Reductin in wrk zne delays 16

17 Examples f DLM Signing Early Lane Merge DO NOT PASS/WHEN FLASHING Late Lane Merge Dynamic Signing STAY IN YOUR LANE / MERGE AHEAD USE BOTH LANES / TO MERGE POINT TAKE YOUR TURN / MERGE HERE SLOW TRAFFIC AHEAD / USE BOTH LANES STAY IN YOUR LANE / MERGE AHEAD XX MILES TAKE YOUR TURN / MERGE HERE USE BOTH LANES STOP TRAFFIC AHEAD MERGE HERE TAKE TURNS Deplyment may als include passive/nn-activated mde fr when merge strategy is n lnger necessary Example: Other Signing LEFT (r RIGHT) LANE CLOSED / XX MILES AHEAD LEFT (r RIGHT) LANE CLOSED 17

18 Examples f Dynamic and Supprting Signs Dynamic Signing Supprt Signing Surce: 18

19 Additinal DLM Resurces Guidance Guidance fr the Use f Dynamic Lane Merging Strategies SWZ Webinar Series Webinar #6: Technlgy Applicatin Case Studies: Variable Speed Limit and Dynamic Lane Merge Descriptin Descriptin f a Late Merge System by MnDOT Deplyment Evaluatin Evaluatin f MnDOT Deplyment Evaluatin f MD SHA Deplyment Evaluatin f FDOT Deplyment 19

20 Fr Mre Infrmatin: SWZ Initiative Leader Jawad Paracha FHWA Office f Operatins (202) Jawad.Paracha@dt.gv Technlgy Applicatins Tdd Petersn FHWA Office f Operatins (202) Tdd.Petersn@dt.gv Prject Crdinatin Martha Kapitanv FHWA Office f Operatins (804) Martha.Kapitanv@dt.gv 20