impact of transit signal priority on bus service performance10 min. headway limitation for tsp...
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University of Minnesota University of Minnesota
Impact of Transit Signal Priority on Bus Service Performance
Chen-Fu Liao Minnesota Traffic Observatory
Department of Civil Engineering
22nd Annual Transportation Research Conference May 24-25, 2011, St. Paul, MN
University of Minnesota University of Minnesota
Acknowledgement
• RITA, USDOT • ITS Institute and CTS, UMN • Metro Transit • City of Minneapolis • Nigel Wilson, Depart. of Civil and
Environmental Engineering, MIT • Minnesota Traffic Observatory (MTO), Dept. of
Civil Engineering, UMN
University of Minnesota University of Minnesota
Outline
v Objectives v Background v Route 10 (Central Avenue) case study v UPA TSP implementation v Impact of TSP on bus performance v Concluding remarks
University of Minnesota University of Minnesota
Objectives
v Various transit strategies to improve service q TSP q Fare payment type q Stop consolidation q BRT and others
v Understand the impact of each strategy v Tool to support transit scheduling, planning
and operation
University of Minnesota University of Minnesota
AVL Data
Bus Travel Time
Measures Applications
Running Time
Dwell Time at Stop
Delay at Signal
Transfer Activity
Database Model
Arrival Time Prediction
Ridership Analysis
Visualization
Arterial Traffic Data
Environmental Factors (Accidents, Incidents, Weather, etc.)
Anomaly Detection
TSP Deployment Suggestions
Schedule Adjustments
Real Time Service Management
Schedule Data
APC Data
GoTo Card
Transit Database
Dat
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Transit Performance Analysis Framework
Liao, C.-F. & Liu, H.X. (2010) "Development of a Data Processing Framework for Transit Performance Analysis", Transportation Research Record, Journal of the Transportation Research Board, No.2143, pp. 34-43.
University of Minnesota University of Minnesota
Transit Performance Analyst
University of Minnesota University of Minnesota
Performance Analysis & Modeling
Analysis v TP time & on-time performance analysis v Link travel time, speed analysis v Route time-space diagram
Modeling v TP based node model v Inter-TP link travel time model v Route model v Model verification and validation
University of Minnesota University of Minnesota
Local vs. Limited Service
RTE
10 M
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For example …
University of Minnesota
Bus Delay and Travel Speed
Other Delays 3%
Data Source: NYC MTA and FTA National Transit Database, 2008
University of Minnesota
Average Bus Speed in Select American Cities
University of Minnesota University of Minnesota
What is TSP?
University of Minnesota
“A tool to help make transit service more reliable, faster, and more cost effective. It has little impact on general traffic and is an inexpensive way to make transit more competitive with the automobile.”
- ITS America TSP planning and implementation handbook
“ Transit signal priority systems use sensors to detect approaching transit vehicles and alter signal timings to improve transit performance. ”
University of Minnesota University of Minnesota
Central Avenue (RTE 10) A component of Minneapolis Urban Partnership Agreement (UPA)
UPA TSP
University of Minnesota University of Minnesota
TSP Intersection
Bus Stops
Bus Route #10
2nd St SE – 53rd Ave v 5.5 miles v 27 TSP Intersections v 40 Bus Stops v 10-20 min headway v Mean TT ~25 min
University of Minnesota University of Minnesota
Description of Changes Related to Route 10! Signals! Service!Signals changed from pre-timed to semi-actuated in Minneapolis. (between 2nd and 27th )! 7/1/2009!
Traffic signal timings implemented in Minneapolis (for general traffic)! 10/1/2009!Traffic signal timings implemented by Mn/DOT and Ramsey County (for general traffic)! 12/1/2009!
TSP Signal Timing Parameters installed on all signals! 12/1/2009!Running time reduction of about 2 minutes on all trips and service types along corridor. Weekday peak route 10 adjusted to coordinate with NorthStar commuter rail schedule.!
12/12/2009!
Initial date when TSP was active for Route 10 (and at Roseville intersections)! 1/1/2010!
10 min. headway limitation for TSP activation in Minneapolis. (2nd St. to 37th Ave.)! 2/25/2010!
Nicollet Mall changed to two-block spacing. Rerouted past Convention Center. Route 829 renumbered to 59. Beginning of 10/59 coordination - 8 trips added to 59!
3/20/2010!
Peak 10 and 59 schedules coordinated - 6 Rte 10 trips converted to Rte 59! 5/15/2010!Change to 5 min. late threshold for all signals! 6/1/2010!Running time increased downtown and beyond 53rd. 3 School trips added to the weekday 10! 9/11/2010!
Change to 3 min late & 8-min headway threshold for all signals! 11/26/2010!
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Schedule Adjustment ! 0
Schedule Adjustment ! 0
Four separate months of Transit Data
University of Minnesota University of Minnesota
Average TSP Call Durations by Intersection ID (Oct. 2010 EMTRAC data)
Average TSP Call Duration
53rd Ave Spring St
University of Minnesota University of Minnesota
Average Link Travel Time
Link Travel Comparisons (AVL/APC vs. EMTRAC) – Oct. 2010
University of Minnesota University of Minnesota
NB Schedule Adherence
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SB Schedule Adherence
University of Minnesota University of Minnesota
TSP Improvement
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TSP Impact (con’t)
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University of Minnesota University of Minnesota
Concluding Remarks
v Service quality and reliability improvements q Fare payment type q Low floor, BRT q Connectivity
v TSP impact on travel time & schedule adherence
v TSP impact on side street v Transit performance analyst tool v Support scheduling & planning
University of Minnesota
Thank You!
Bus Arrival Info.
TSP Chen-Fu Liao, [email protected] 612-626-1697