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Wei Feng Dr. Miguel Figliozzi Portland State University

Developing a Bus Service Reliability Evaluation and Visualization Framework Using Archived AVL/APC Data. Wei Feng Dr. Miguel Figliozzi Portland State University. 6/27/2012. 1. Outline. Background Motivation Objective Data description and route configuration

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Wei Feng Dr. Miguel Figliozzi Portland State University

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  1. Developing a Bus Service Reliability Evaluation and Visualization Framework Using Archived AVL/APC Data Wei Feng Dr. Miguel Figliozzi Portland State University 6/27/2012 1

  2. Outline • Background • Motivation • Objective • Data description and route configuration • Performance measures and visualization examples • Summary • Future work 2

  3. Background • PORTAL (Portland Oregon Regional Transportation Archive Listing) it is a multi-modal transportation data archive and web-based visualization system. • Transit data are complicated and difficult to manipulate and have not been incorporated into Portal yet. • TriMet is going to upgrade the existing bus dispatching system with higher resolution AVL data. 3

  4. Motivation • Service reliability is important for both transit agencies and passengers • Under utilization of large amount of (Automatic vehicle location) AVL and (Automatic passenger counter) APC data • Reduce research overlap 4

  5. Objective • Develop a bus service reliability evaluation and visualization framework that can convert large amount of AVL, APC data into valuable information and performance measures with visual aids 5

  6. Performance measures • Aggregated (certain time of day over multiple days) identify recurrent problems • Disaggregated operational records (specific date and time of day) examine more detail information 6

  7. Route configuration 7

  8. Aggregated On-time performance (WB) 1 A 0.95 B 0.9 C 0.85 D Level of Service Scale 0.8 Hours E 0.75 0.7 0.65 F 0.6 0.55 WB 0.55 8

  9. Aggregated Schedule adherence between 11am and 12am (WB) 75% quartile Schedule deviations between 11am and 12 pm (WB) median Actual– schedule departure time (seconds) 25% quartile Sample maximum Sample minimum + Outliers On – time threshold West 9

  10. Aggregated headway frequency AM peak hours (WB) Frequency West 10

  11. Aggregated West 11

  12. Aggregated West 12

  13. Disaggregated Time space diagram West 13

  14. Disaggregated Dynamic visualization 14

  15. Summary • Route level bus service reliability evaluation and visualization are helpful to transit agencies • Aggregated reliability performance measures are helpful for recurrent problems • Disaggregated performance visualization can help understand particular causes 15

  16. Future work • Integrate all these performance measures and visual aids with Portlal • Extend the same algorithm to all other routes in TriMet • Upgrade with new TriMet Bus dispatching system data 16

  17. Acknowledgement • Steve Callas and David Court (TriMet) • OTREC (Oregon Transportation Research and Education Consortium) • Eric Albright, Scott Price (ITS Lab at PSU) 17

  18. Thank you Questions? Wei Feng Email: wfeng@pdx.edu Website: http://web.cecs.pdx.edu/~wfeng/ Dr. Miguel Figliozzi Email: figliozzi@pdx.edu Website: http://web.cecs.pdx.edu/~maf/ Route 9 dynamic visualization: http://web.cecs.pdx.edu/~eea/trimetViz/tspviz.php Portal official: http://portal.its.pdx.edu/home/ Portal demo: http://demo.portal.its.pdx.edu/Portal/index.php/pedbike TriMet: http://ride.trimet.org/?tool=routes 20

  19. Data description 6

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