Deploying Transit Signal Priority Systems

Transcription

1 Deploying Transit Signal Priority Systems Christopher Poe, Ph.D., P.E. Assistant Agency Director ITS Annual Meeting Austin, September 5, 2008

2 Acknowledgements n DART - Abed Abukar, Chris Patrick, and Koorosh Olyai n City of Dallas - Mark Titus and Beth Ramirez n Consulting Team g Teal Engineering g DKS Associates g Telvent Farradyne

3 Presentation Outline n Overview of Project n Transit Perspective n Traffic & Signal Perspective n Lessons Learned n Next Steps

4 Project Overview n n n n DART Green Line g Opening Sept 14, 2009 g Radio spots currently running Draft LRT Schedule Developed g LRT headways in downtown will be to 2.5 min in the peak period Transit Signal Priority at intersections to maintain headways City Traffic Signal System g 170 Controllers g BiTran firmware (v. Dallas 255)

5 DART Light-Rail System

6 TSP Terminology n Pre-emption g truncate pedestrians and service train movement n Full Priority g Service pedestrians and then service train movement n Partial Priority Green Band Running g Service pedestrians and service trains within a green band that allows early greens or green extensions

7 Roles and Responsibilities n n DART g g Responsible for providing train detection to the City Traffic Signal System Responsible for the communication of train detection data City of Dallas g Responsible for providing transit priority at the traffic signals, which includes: afield controllers and firmware acentral software for monitoring acommunication between signal controllers acount down timers for train operators

8 Transit Perspective n LRT Construction g LRT tracks & stations g Track junction upgrades g Station upgrades for level boarding n Train Detection & Communication g Magnetometer detection g Wireless communications n Count down timers for train operators

9 Train Detection

10 City Traffic & Signal System n Maintain City Street Coordination n City Upgrading TMC Hardware, Field Controllers, and Controller Firmware g Signals along transit mall = 1% of traffic signal system n Additional Functionality g All-way pedestrian phase ( ped scramble ) g Cross street monitoring / queue detection

11 Traffic System Phases Phase 1 Supports LRT headway schedule Provides early green and green extension Implement for testing March 2009 Installation of train detection Supports countdown timer and basic function report capability Ability to cancel priority requests May require software modification Supports some peer-to-peer communication Phase 2

12 City of Dallas Traffic Signals (15 along LRT corridor)

13 Lessons Learned n Agency Coordination g DART, City, & MPO g Administrative Action Coordination n Solutions = Compromises n Engineering Capacity g Public Agencies g Consultants being ^

14 Lessons Learned (cont.) n Technical Coordination g Detection being ^ g Communication n Integrating & Upgrading Legacy Systems n System Engineering g Concept of Operations g Requirements n Change Management

15 TSP Project High-Level Schedule Flow Chart DART Train Detection Basis of Design Train Detection & Comm Design (7/31/08) Detection System Procurement (6/25 9/9/08) Detection System Installation (9/10/08-3/03/09) Completed In-Progress Remaining Concept of Operations Traffic Signal System Requirements (6/30/08) Define Interim Requirement Subset (9/30/08) Interim Detector and Communication Design (7/1 11/08) Implementation of Design and Timing plans (10/1/08 2/28/09) Initial Testing (March 2009) Full Testing (May 2009) Begin Operations (Sept 2009) Full TSP Operation (2011) City of Dallas Traffic Signal System Retiming (6/3/08 12/31/08) Phase 1 Traffic Signal Retiming Implementation (1/1/09-2/27/09) Phase 2 Retiming Implementation (3/1-5/1/09) Traffic Signal System Specification (10/08) Traffic Signal System Procurement (10/08-04/09) Traffic Signal System Installation 2010 Traffic Signal System Testing 2010

16 Schedule n Train detection design Completed n Start of Construction - September 2008 n End of construction February 28, 2009 n Start of system testing March 1, 2009 n System fully functional August 1, 2009 n Train operator certification August 2009 n Non-revenue service Sept 1-13, 2009 n Low level boarding and VBS are parallel efforts (Completion 2010) n Ultimate TSP December 2011 ITS/Operations Technology

17 Questions?