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City of Portland - TRB Transit Signal Priority Workshop 2002 Bus Priority in Portland - Lessons Learned Bill Kloos City of Portland (Prepared 12/3/01)

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Presentation on theme: "City of Portland - TRB Transit Signal Priority Workshop 2002 Bus Priority in Portland - Lessons Learned Bill Kloos City of Portland (Prepared 12/3/01)"— Presentation transcript:

1 City of Portland - TRB Transit Signal Priority Workshop 2002 Bus Priority in Portland - Lessons Learned Bill Kloos City of Portland (Prepared 12/3/01)

2 City of Portland - TRB Transit Signal Priority Workshop 2002 The problem - buses in mixed flow

3 City of Portland - TRB Transit Signal Priority Workshop 2002 Exclusive bus lanes are the best option

4 City of Portland - TRB Transit Signal Priority Workshop 2002 But, our talk is about mixed flow.

5 City of Portland - TRB Transit Signal Priority Workshop 2002 Outline for Todays TSP Talk History of transit priority in Portland System architecture for bus priority Portlands large scale bus priority project Lessons learned

6 City of Portland - TRB Transit Signal Priority Workshop 2002 Outline for Todays TSP Talk History of transit priority in Portland System architecture for bus priority Portlands large scale bus priority project Lessons learned

7 City of Portland - TRB Transit Signal Priority Workshop 2002 Transit definition: Light Rail Bus

8 City of Portland - TRB Transit Signal Priority Workshop 2002 Light rail preemption Station-to-station running w/o stopping Mostly emergency vehicle-like preemption Detected via Vetag and inductive loops In CBD, goes with progression

9 City of Portland - TRB Transit Signal Priority Workshop 2002 Bus Priority Two issues: Detection method Priority method Kloos Way

10 City of Portland - TRB Transit Signal Priority Workshop 2002 Have Tried 3 Detection Methods: LoopComm –Hockey puck & loop TOTE (1st generation) – Amtech RF tags & reader Opticom – Emitter and detector Current Choice

11 City of Portland - TRB Transit Signal Priority Workshop 2002 Various TSP Methods Tried Provide green extension, red truncation Provide queue jumps Provide bus-only phase Eliminate phase skipping

12 City of Portland - TRB Transit Signal Priority Workshop 2002 Basic premise: –If arrive on green, extend a few seconds more –If arrive on red, shorten other phases to return earlier Powell Blvd test (1993): –3 intersections using Wapiti Type 170 software –5% to 8% travel time reduction peak direction –discontinued due to inflexible phase shortening Provide green extension / red truncation

13 City of Portland - TRB Transit Signal Priority Workshop 2002 Outline for Todays TSP Talk History of transit priority in Portland System architecture for bus priority Portlands large scale bus priority project Lessons learned

14 City of Portland - TRB Transit Signal Priority Workshop 2002 Basis for Bus Signal Priority Direction in Portland Three main concepts: Use Tri-Mets GPS based AVL (smart bus concept) Use bus-controller communication method shared with Fire (Opticom) Develop next generation Type 170 controller and software

15 City of Portland - TRB Transit Signal Priority Workshop 2002 Basis for Bus Signal Priority Direction in Portland But always keep control distributed!!!

16 City of Portland - TRB Transit Signal Priority Workshop 2002 1. Use Basic Smart Bus Concept 1. Smart bus knows location and schedule status 2. Bus communicates priority request to signal 3. Local controller provides priority

17 City of Portland - TRB Transit Signal Priority Workshop 2002 2. Use existing Opticom for Communication 150+ of 963 intersections had Opticom Most suburbs have 100% Opticom Goal is for City to also reach 100% Dont want another intersection add-on piece of hardware Makes expansion easy

18 City of Portland - TRB Transit Signal Priority Workshop 2002 3. Develop next generation of controller and firmware From 6800 based Type 170 to 170 HC11 Future will use ATC Port existing program to new platform. Continue to expand algorithms

19 City of Portland - TRB Transit Signal Priority Workshop 2002 Next generation firmware Will be upgrade of existing Wapiti local intersection program Will include extended priority functions - –will add smart recovery options –will include improved green extension routine

20 City of Portland - TRB Transit Signal Priority Workshop 2002 Basic description of how it works A smart bus knows its location in time and space. When the bus is late, it activates its Opticom emitter. The intersection receives the low priority call and extends green or truncates red as defined in the controllers database. As the bus passes the intersection detector, the priority call is dropped and the controller returns to normal operation.

21 City of Portland - TRB Transit Signal Priority Workshop 2002 What is the definition of late? Industry standard - 5 minutes late BDS reporting - 7 minutes late For our bus priority project - –bus activates emitter when 90 seconds late –bus deactivates emitter when 30 seconds late –may decrease value later

22 City of Portland - TRB Transit Signal Priority Workshop 2002 Outline for Todays TSP Talk History of transit priority in Portland System architecture for bus priority Portlands large scale bus priority project Lessons learned

23 City of Portland - TRB Transit Signal Priority Workshop 2002 What are our implementation plans? Or, do we have any - Money? Yes we do!

24 City of Portland - TRB Transit Signal Priority Workshop 2002 TEA-21 Earmark for signals $4.5 million high priority project Intended to provide signal priority for emergency and transit vehicles Will be used to: –Install Opticom on 775 buses –Provide priority at 250+ intersections –Retrofit 190+ intersections with Opticom detectors

25 City of Portland - TRB Transit Signal Priority Workshop 2002 Central City Clackamas TC St Johns Gresham Washington Square Beaverton Oregon City Gateway TC Phase II Phase I 4 Milwaukie 4 4 4 72 12 9 9 9 14 19 15 6 6 5 5 5 75 71 33 8 8 56 54 Phase III Where? Every where!

26 City of Portland - TRB Transit Signal Priority Workshop 2002 Project status Tri-Met has installed Opticom emitters on buses and revised the bus software Activated priority on pilot corridor (line #4) last July (55 intersections out of 71 total) Completed major arterial (Barbur Blvd) with 12 intersections last September Will do 4 other lines this winter/spring

27 City of Portland - TRB Transit Signal Priority Workshop 2002 City / Tri-Met Partnership for Transit Priority Signal priority is only one element Have established joint program for all aspects of transit priority –special lanes, curb extensions, stop relocation Tri-Met plans to provide ~$1.5 mil/yr Hope for true impact on operating costs

28 City of Portland - TRB Transit Signal Priority Workshop 2002 But, most of all... Were working together to find solutions!!!

29 City of Portland - TRB Transit Signal Priority Workshop 2002 Outline for Todays TSP Talk History of transit priority in Portland System architecture for bus priority Portlands large scale bus priority project Lessons learned

30 City of Portland - TRB Transit Signal Priority Workshop 2002 LL#1 - Bus AVL data is your friend. Tri-Mets AVL: Uses a PCMCIA Data Card for each bus. Each bus records data throughout the day. The bus makes a data record for each stop or event Over 600,000 records are generated per day

31 City of Portland - TRB Transit Signal Priority Workshop 2002 AVL information obtained Service Date Vehicle Number Train No. (Block) Badge Number Route Day Type Trip Number Scheduled Time Actual Arrive Time Actual Leave Time Dwell Door Open (yes or no) Lift Used (yes or no) Maximum Speed Distance Between Stops X & Y Coordinates

32 City of Portland - TRB Transit Signal Priority Workshop 2002

33 Map of delay Not in the City of Portland

34 City of Portland - TRB Transit Signal Priority Workshop 2002 Analyzing the Data Delay By Segment Shows delay by direction -

35 City of Portland - TRB Transit Signal Priority Workshop 2002 AVL used for overall analysis Results from Portland pilot routes: 10% reduced travel time - peak period / peak direction 8-10% improvement in on-time performance

36 City of Portland - TRB Transit Signal Priority Workshop 2002 AVL data caveat - Sometimes we had trouble turning the mounds of AVL data into understandable information for for decision makers.

37 City of Portland - TRB Transit Signal Priority Workshop 2002 LL#2 - The devils in the details Developing and implementing TSP for the controller is labor intensive. The truncation / extension algorithm requires review of each location Method requires mounds of data the needs to be checked and re-checked Similar intersections are not similar.

38 City of Portland - TRB Transit Signal Priority Workshop 2002

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40 LL#3 - TSP is an iterative process. With fixed route transit, the schedule needs to be optimized to take advantage of priority Initial schedule change on the pilot route took too much time out of the schedule

41 City of Portland - TRB Transit Signal Priority Workshop 2002 LL#4 - Working together is best. Need to include all groups from each agency - –signal and operations staff w/City –schedulers, operators, analysts, ITS staff, and PMs for transit agency Reviewing the route block-by-block

42 City of Portland - TRB Transit Signal Priority Workshop 2002

43 Bottom line - Bus signal priority can help reduce travel time and improve on-time performance The process requires involving staffs from both the traffic and transit agencies The process is iterative and takes time to reach the final objective.


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