Atherton Street Traffic Signal & ITS Improvements6AD7E2DC-ECE4-41CD...Atherton Street Traffic Signal...

Atherton Street Traffic Signal & ITS

Improvements

SR 3014 – Section N11

Improvements Evaluation

October 1, 2012


ImprovementsAgenda

Project Team IntroductionsGoals & ObjectivesProject OverviewTravel Time ImprovementsCATA Schedule AdherenceBenefit-Cost AnalysisProject Challenges


ImprovementsProject Team

Dennis Prestash – ITS & Congestion ManagerJim Roman, P.E. – Traffic Signals EngineerEric Murnyack – Construction EngineerMark Czajkowski – Field InspectionMike Preston – Incident Management

Stan Niemczak, P.E. – Project ManagerSteve Cunningham, P.E. – Traffic & ITS Engineer


ImprovementsGoals and Objectives

Improvement of traffic flow along Atherton Street Modified traffic signal timings

Decrease in CATA vehicle travel time Transit Signal Priority System

Provide traffic surveillance CCTV System

Provide traveler information DMS Installations


ImprovementsProject Overview

18 Signalized Intersections Bus Depot to Douglas Drive Vairo Boulevard

7 Closed Circuit TV (CCTV) Cameras

2 Dynamic Message Sign (DMS) Installations


ImprovementsProject Overview

4 Municipalities Patton Township Ferguson Township State College Borough College Township

Transit Signal Priority System

Incident Management Plan


ImprovementsProject 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


ImprovementsProject 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


ImprovementsTravel 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


Improvements

GPS-based data collection for “After” Runs

Travel Time Comparison

Speed and position of vehicle at 1-second intervals Multiple Runs

during analysis periods – valid data



Travel Time Measures of Effectiveness Average Travel TimeElapsed 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



Direction Time of Day Data Set

Average Travel Time (min:sec)

Average System Delay

(min:sec)

Eastbound

AM Peak

Before 6:47 2:01After∆ Travel Time% Change

Midday


PM Peak







(min:sec)

Eastbound

AM Peak

Before 6:47 2:01After 5:57 1:11∆ Travel Time% Change

Midday


PM Peak







(min:sec)

Eastbound

AM Peak

Before 6:47 2:01After 5:57 1:11∆ Travel Time - 0:50 - 0:50% Change -12% -41%

Midday


PM Peak







(min:sec)

Westbound

AM Peak


Midday


PM Peak




Average Travel Times reduced 5 to 16 percent



Average System Delay reduced 16 to 51 percent


ImprovementsTravel Time ComparisonAM Peak Time-Space Diagram

0

50

100

150

200

250

300

350

400

450

500

-1000 1000 3000 5000 7000 9000 11000 13000 15000

Tim

e (s

ec)

Distance (ft)

Bus

D

epot

White Cou

rse

Curtin

Park

Hillcrest

Cherry

Blue

Cou

rse

North Hills P

lace

Aaron

Vai

ro

N. A

therton Place

Patriot

Colonn

ade Way

Colonn

ade Blvd.

Douglas

Woo

dycrest


ImprovementsTravel Time ComparisonMidday Time-Space Diagram


ImprovementsTravel Time ComparisonPM Peak Time-Space Diagram


ImprovementsCATA Schedule Adherence

Normal Operation

Transit Signal PriorityMinimumSetting



Normal Operation

Transit Signal Priority(maximum time)

MinimumSetting



• Pedestrian Minimum time maintained

• TSP not active in following 1-2 cycles

• Minimizes side street impact

• No side street TSP

MinimumSetting



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



CATA Route

Buses per day

Before Timing

Changes

State College Borough Signal Timing Changes

ChangeAfter

Patton/Ferguson Timing Changes

Change

A 8 65.9

G 5 92.7

H 35 80.5

N 33 80.6

NV 40 38.1

VE 44 97.9

V 34 82.8

W 22 84.3

RL 61 82.7

GL 5 76.1

Z 5 67.5

Figures represent percentage of vehicles on-time/early



CATA Route

Buses per day

Before Timing

Changes


ChangeAfter


Change

A 8 65.9 73.6 +7.7

G 5 92.7 92.6 -0.1

H 35 80.5 79.9 -0.6

N 33 80.6 82.9 +2.3

NV 40 38.1 40.6 +2.5

VE 44 97.9 99 +1.1

V 34 82.8 85.8 +3.0

W 22 84.3 87.4 +3.1

RL 61 82.7 81.6 -1.1

GL 5 76.1 79.3 +3.2

Z 5 67.5 71.8 +4.3




CATA Route

Buses per day

Before Timing

Changes


ChangeAfter


Change

A 8 65.9 73.6 +7.7 77.7 +11.8

G 5 92.7 92.6 -0.1 91.6 -1.1

H 35 80.5 79.9 -0.6 85.6 +5.1

N 33 80.6 82.9 +2.3 84.8 +4.2

NV 40 38.1 40.6 +2.5 42.7 +4.6

VE 44 97.9 99 +1.1 99.6 +1.7

V 34 82.8 85.8 +3.0 87.5 +4.7

W 22 84.3 87.4 +3.1 88.7 +4.4

RL 61 82.7 81.6 -1.1 86.1 +3.4

GL 5 76.1 79.3 +3.2 78.2 +2.1

Z 5 67.5 71.8 +4.3 69.7 +2.2




Observed increase in schedule adherence Directly attributed to the modified signal timings

Transit Signal Priority System TSP only on small portion of overall transit routeExpansion of system would be beneficial

Small window of opportunity for TSP activation Incremental decreases in travel time at TSP

intersections


ImprovementsBenefit Analysis

Average System Delay improvements converted to cost savings

Signal timing optimization alone provides$2.85 million in motorist savings over 15 year project life cycle

Vehicle TypeTime Value

Cost (per hour)Idling Cost(per hour)

Total Cost(per hour)

Cars $15.75 $0.95 $16.70Trucks $26.25 $1.10 $27.35


ImprovementsCCTV & 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


ImprovementsCCTV & DMS Deployments511pa.com Camera Views Per Week


ImprovementsProject 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


ImprovementsProject 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


ImprovementsGoals and Objectives

Improvement of traffic flow along Atherton Street Modified traffic signal timings

Decrease in CATA vehicle travel time Transit Signal Priority System

Provide traffic surveillance CCTV System

Provide traveler information DMS Installations


ImprovementsQuestions or Comments?

Steve Cunningham, P.E., PTOEJacobs Engineering900 Northbrook Drive, Suite 300Trevose, PA 19053

[email protected]

Denny PrestashPennDOT District 2-01924 Daisy StreetClearfield, PA 16830

[email protected]

Atherton Street Traffic Signal & ITS Improvements6AD7E2DC-ECE4-41CD...Atherton Street Traffic Signal...

Documents

Transcript of Atherton Street Traffic Signal & ITS Improvements6AD7E2DC-ECE4-41CD...Atherton Street Traffic Signal...