Atherton Street Traffic Signal & ITS Improvements
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1 SR 3014 Section N11 Evaluation October 1, 2012
2 Agenda Project Team Introductions Goals & Objectives Project Overview Travel Time CATA Schedule Adherence Benefit-Cost Analysis Project Challenges
3 Project Team Dennis Prestash ITS & Congestion Manager Jim Roman, P.E. Traffic Signals Engineer Eric Murnyack Construction Engineer Mark Czajkowski Field Inspection Mike Preston Incident Management Stan Niemczak, P.E. Project Manager Steve Cunningham, P.E. Traffic & ITS Engineer
4 Goals and Objectives Improvement of traffic flow along Modified traffic signal timings Decrease in CATA vehicle travel time Transit Signal Priority System Provide traffic surveillance CCTV System Provide traveler information DMS Installations
5 Project Overview 18 Signalized Intersections Bus Depot to Douglas Drive Vairo Boulevard 7 Closed Circuit TV (CCTV) Cameras 2 Dynamic Message Sign (DMS) Installations
6 Project Overview 4 Municipalities Patton Township Ferguson Township State College Borough College Township Transit Signal Priority System Incident Management Plan
7 Project Schedule CATA Transit Signal Priority Study 2003 Preliminary Engineering & Final Design Fall 2008 through Spring 2010 Let Date May 13, 2010 Wellington Power Corporation awarded contract
8 Project Schedule Physical Construction Complete Winter 2010/11 Systems Testing and Acceptance Winter 2010/11 Operational Support Period through February 2012 Transit Signal Priority and Traffic Signal Timing Modifications based on municipal feedback & field observations
9 Travel Time Comparison Travel Time & Delay Study Floating Car Runs AM Peak (6-9 AM); Mid-Day (11 AM-2 PM); PM Peak (3-6 PM) Before Runs Fall 2008 After Runs Fall 2011
10 Travel Time Comparison GPS-based data collection for After Runs Speed and position of vehicle at 1-second intervals Multiple Runs during analysis periods valid data
11 Travel Time Comparison Travel Time Measures of Effectiveness Average Travel Time Elapsed travel time from center of first intersection to center of last intersection Average System Delay (Average Travel Time) (theoretical unconstrained vehicle travel time) Evaluated by direction and time-of-day Douglas Drive to Bus Depot Pedestrian Crossing
12 Travel Time Comparison Direction Time of Day Data Set Eastbound AM Peak Midday PM Peak Average Travel Time (min:sec) Average System Delay (min:sec) Before 6:47 2:01 After Travel Time % Change Before 7:35 2:49 After Travel Time % Change Before 7:15 2:29 After Travel Time % Change
13 Travel Time Comparison Direction Time of Day Data Set Eastbound AM Peak Midday PM Peak Average Travel Time (min:sec) Average System Delay (min:sec) Before 6:47 2:01 After 5:57 1:11 Travel Time % Change Before 7:35 2:49 After 6:23 1:37 Travel Time % Change Before 7:15 2:29 After 6:19 1:33 Travel Time % Change
14 Travel Time Comparison Direction Time of Day Data Set Eastbound AM Peak Midday PM Peak Average Travel Time (min:sec) Average System Delay (min:sec) Before 6:47 2:01 After 5:57 1:11 Travel Time - 0:50-0:50 % Change -12% -41% Before 7:35 2:49 After 6:23 1:37 Travel Time - 1:12-1:12 % Change -16% -43% Before 7:15 2:29 After 6:19 1:33 Travel Time - 0:56-0:56 % Change -13% -38%
15 Travel Time Comparison Direction Time of Day Data Set Westbound AM Peak Midday PM Peak Average Travel Time (min:sec) Average System Delay (min:sec) Before 6:05 1:19 After Travel Time % Change Before 7:11 2:25 After Travel Time % Change Before 8:11 3:25 After Travel Time % Change
16 Travel Time Comparison Direction Time of Day Data Set Westbound AM Peak Midday PM Peak Average Travel Time (min:sec) Average System Delay (min:sec) Before 6:05 1:19 After 5:25 0:39 Travel Time % Change Before 7:11 2:25 After 6:48 2:02 Travel Time % Change Before 8:11 3:25 After 7:19 2:33 Travel Time % Change
17 Travel Time Comparison Direction Time of Day Data Set Westbound AM Peak Midday PM Peak Average Travel Time (min:sec) Average System Delay (min:sec) Before 6:05 1:19 After 5:25 0:39 Travel Time - 0:40-0:40 % Change -11% -51% Before 7:11 2:25 After 6:48 2:02 Travel Time - 0:23-0:23 % Change -5% -16% Before 8:11 3:25 After 7:19 2:33 Travel Time - 0:52-0:52 % Change -11% -25%
18 Travel Time Comparison Average Travel Times reduced 5 to 16 percent
19 Travel Time Comparison Average System Delay reduced 16 to 51 percent
20 Travel Time Comparison AM Peak Time-Space Diagram Distance (ft) Time (sec) Douglas Colonnade Blvd. Colonnade Way North Hills Place Blue Course Hillcrest White Course Bus Depot Patriot Woodycrest N. Atherton Place Vairo Aaron Cherry Park Curtin
21 Travel Time Comparison AM Peak Time-Space Diagram Distance (ft) Time (sec) Douglas Colonnade Blvd. Colonnade Way North Hills Place Blue Course Hillcrest White Course Bus Depot Patriot Woodycrest N. Atherton Place Vairo Aaron Cherry Park Curtin
22 Travel Time Comparison AM Peak Time-Space Diagram Distance (ft) Time (sec) Douglas Colonnade Blvd. Colonnade Way North Hills Place Blue Course Hillcrest White Course Bus Depot Patriot Woodycrest N. Atherton Place Vairo Aaron Cherry Park Curtin
23 Travel Time Comparison Midday Time-Space Diagram
24 Travel Time Comparison PM Peak Time-Space Diagram
25 CATA Schedule Adherence Normal Operation Transit Signal Priority Minimum Setting
26 CATA Schedule Adherence Normal Operation Minimum Setting Transit Signal Priority (maximum time)
27 CATA Schedule Adherence Pedestrian Minimum time maintained TSP not active in following 1-2 cycles Minimum Setting Minimizes side street impact No side street TSP
28 CATA Schedule Adherence CATA historical schedule adherence data Collected and provided through Automated Vehicle Location (AVL) system % early/on-time vs. % late Evaluated at several points throughout project implementation Before signal timing modifications After State College Borough modifications After Patton/Ferguson modifications
29 CATA Schedule Adherence CATA Route Buses per day Before Timing Changes State College Borough Signal Timing Changes Change After Patton/Ferguson Timing Changes Change A G H N NV VE V W RL GL Z Figures represent percentage of vehicles on-time/early
30 CATA Schedule Adherence CATA Route Buses per day Before Timing Changes State College Borough Signal Timing Changes Change After Patton/Ferguson Timing Changes Change A G H N NV VE V W RL GL Z Figures represent percentage of vehicles on-time/early
31 CATA Schedule Adherence CATA Route Buses per day Before Timing Changes State College Borough Signal Timing Changes Change After Patton/Ferguson Timing Changes Change A G H N NV VE V W RL GL Z Figures represent percentage of vehicles on-time/early
32 CATA Schedule Adherence Observed increase in schedule adherence Directly attributed to the modified signal timings Transit Signal Priority System TSP only on small portion of overall transit route Expansion of system would be beneficial Small window of opportunity for TSP activation Incremental decreases in travel time at TSP intersections
33 Benefit Analysis Average System Delay improvements converted to cost savings Time Value Idling Cost Total Cost Vehicle Type Cost (per hour) (per hour) (per hour) Cars $15.75 $0.95 $16.70 Trucks $26.25 $1.10 $27.35 Signal timing optimization alone provides $2.85 million in motorist savings over 15 year project life cycle
34 CCTV & DMS Deployments Seven CCTV locations Between Valley Vista Drive and Beaver Avenue Municipal agreements for CCTV mounting on signal mastarms Available to public via 511PA website Two DMS locations Eastbound at Valley Vista Drive Westbound at Rolling Ridge Drive Local traveler information & special event planning
35 CCTV & DMS Deployments 511pa.com Camera Views Per Week
36 Project Challenges Challenge: CATA emitters triggering Emergency Vehicle Preemption Court Injunction caused delays in manufacturer response (lifted Fall 2011) Solution: Hardware & Software modifications Preemption equipment upgraded at off-site intersections Spare equipment provided to municipalities for future maintenance needs
37 Project Challenges Challenge: Econolite TSP software error TSP intersections not operating correctly due to controller software programming Solution: High-Priority software revision issued Manufacturer issued software upgrade for nationwide use based on PennDOT feedback
38 Goals and Objectives Improvement of traffic flow along Modified traffic signal timings Decrease in CATA vehicle travel time Transit Signal Priority System Provide traffic surveillance CCTV System Provide traveler information DMS Installations
39 Questions or Comments? Denny Prestash PennDOT District Daisy Street Clearfield, PA Steve Cunningham, P.E., PTOE Jacobs Engineering 900 Northbrook Drive, Suite 300 Trevose, PA
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