its at trimet: improving service and saving money
TRANSCRIPT
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ITS at TriMet: Improving Service & Saving Money
David T. Crout TriMet
[email protected] www.trimet.org
Presentation to Portland State University Center for Transportation Studies
Transportation Seminar Series
March 6, 2009
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Presentation Outline• Automatic Vehicle Location (AVL) Overview
Data Collection & Analysis ProcessReports & Data Products
• Real-Time Bus & Train Arrival Information ("Transit Tracker™")
Arrival EstimationOn-Street SignsInternet & Phone/PDA Applications
• Transit Signal Priority (TSP)• Automatic Stop Announcements (Bus)
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DataCard
DataCard
ScheduleMatch Process
(Post Processing)
RelationalDatabase
AVL Data Collection and Analysis Process
Reports
Block Datainserted into VCH
Bus Collects Data Along its Route
Actual Stop DataUploaded to Network
Two Types of Data Collected
Stops Data (Automatically Collected)-Information collected at each bus stop-Approximately 500,000 records per day
Event Data (Operator Generated Data)-Special events at various locations-Approximately 25,000 records per day
500,000 Daily Stop Records
• Route Number• Direction• Trip Number• Service Date• Vehicle Number• Operator ID• Bus Stop Location• Actual Arrive Time• Actual Leave Time
• Scheduled Time• Ons & Offs (apc’s)• Passenger Load• Door Opened• Lift Usage • Dwell Time• Maximum Speed• Longitude• Latitude
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Automatic Passenger Counter
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PCMCIA Data Card
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Dispatcher Screens
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Reports & Data Products
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Locations of Buses in Fallback Mode(Lost Contact with Radio Tower)
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• Vehicle position is determined by track circuits and loops for rail, and GPS for bus.
• Arrival estimation algorithm relies on both location and early/late status of vehicle.
• AVL system receives early/late status update approximately every 90 seconds.
• Arrival estimate is determined by adjusting the scheduled running time by the early/late status of vehicle.
Transit Tracker™ Arrival Estimation
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Arrival Estimation Process
Scheduled Arrival: 3:00 pm Estimated Arrival: 3:00pm Actual Arrival: 3:00 pm
Example 1: Bus On Time
10 Minutes
Time of Estimate: 2:50 pm Estimated Minutes Until Arrival: 10
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Arrival Estimation Process
Scheduled Arrival: 3:00 pm Estimated Arrival: 3:00 pm
Example 2: Bus Becomes DelayedInitial Estimate Time of Estimate: 2:50 pm Bus Early/Late Status: On Time Estimated Minutes Until Arrival: 10
Scheduled Arrival: 3:00 pm Estimated Arrival: 3:03 pm Scheduled Travel Time: 5 min. Adjusted Travel Time: 8 min.
Updated Estimate Time of Estimate: 2:55 pm Bus Early/Late Status: 3 Minutes Late Estimated Minutes Until Arrival: 8
Updated Total Travel Time13 Minutes
Transit Tracker™ On-street Displays
• Single-line displays
Transit Tracker™ On-street Displays
• Multi-line displays
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Flat Screen Monitors at Kaiser Permanente Interstate Medical Offices
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Transit Tracker™ Internet & Phone/PDA Applications
33www.trimet.org
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www.trimet.org/transittracker/stopidnumbers.htm
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39www.trimet.org/transittracker/ttbyphone.htm
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Transit Tracker™
by PhoneMonthly Transit Tracker Usage
0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
March
April
May
June Ju
ly
August
Septem
ber
October
Novem
berDec
ember
Janua
ry
Febru
ary
Num
ber o
f Cal
ls
March 2008 to February 2009
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www.trimet.org/transittracker/wireless.htm
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Transit Signal Priority (TSP)
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• Increase person trips through selected traffic corridors while minimizing impacts on minor movements.
• Reduce transit running times.• Improve transit schedule reliability:
• Reduce running time variability.• Reduce excess time built into
schedule to offset variability.• Defer providing additional transit
capacity.
TriMet’s TSP Goals
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Opticom™ Emitter
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Opticom™ Detector
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• Bus Dispatch/Automatic Vehicle Location System (BDS/AVL) tracks bus location and schedule status.
• If conditions are met, bus emitter (Opticom) communicates priority request to signal.
• Signal controller then grants priority request.
TSP Process
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Scheduled Run Time84 Minutes
(30th Percentile)
Existing Recovery20 (104) Minutes(99th percentile)
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Scheduled Run Time84 Minutes
(30th Percentile)
Existing Recovery20 (104) Minutes(99th percentile)
New Run Time83 Minutes
(40th Percentile)
New Recovery10 (93) Minutes
(95th Percentile)
Automatic Stop Announcements (Bus)
• Phase 1 Implemented December 2006External announcements only.Where stop serves more than one route
• Phase 2 Implemented December 2007: 31 routes will be complete by end of March
2009.Readerboard display of selected stops.Audio announcement of selected stops.
• Benefits all Passengers
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Automatic Stop Announcements (Bus)
• Transfer location.• First stop on new street.• Last stop in fare zone.• If >1 mile since last announcement (not
strictly applied).• Public Service Announcements also
announced.
Criteria for Announced Stops:
