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Displaying travel times on Changeable Message Signs in the SF Bay Area

Displaying travel times on Changeable Message Signs in the SF Bay Area. JD Margulici & Samuel Yang, CCIT ITS America’s 2007 Annual Meeting & Exposition – Session #5. Presentation Outline. Program Overview System Capabilities Evaluation and User Feedback. Program Participants. Timeline.

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Displaying travel times on Changeable Message Signs in the SF Bay Area

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  1. Displaying travel times on Changeable Message Signs in the SF Bay Area JD Margulici & Samuel Yang, CCIT ITS America’s 2007 Annual Meeting & Exposition – Session #5

  2. Presentation Outline • Program Overview • System Capabilities • Evaluation and User Feedback

  3. Program Participants

  4. Timeline 2005 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Program Start Pilot Deployment Phase 1 Deployment 20 Signs Code Verification Program Evaluation 2006 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Phase 2 Start Architecture Completed 2007 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Phase 2A Deployment Public Transit Information 10 Additional Signs Phase 1’ Deployment Administrator GUI Additional Destinations Phase 2B Deployment 10 Additional Signs Code Verification

  5. How does it work? Changeable message sign SF DOWNTOWN VIA 101 24 MIN VIA 280 40 MIN Speed radars Loop detectors Data: ETC readers • 1/3 toll tag readers • 1/3 inductive loops • 1/3 Doppler radars

  6. Full Deployment “Vision” • 80+ active Changeable Message Signs • Freeway operator fully autonomous • System administration and maintenance • Programming routes and schedules • TMC operators ‘in the loop’ • Graphical User Interface to control CMS display in real time • System deployable in other Caltrans districts • And of course, HAPPY COMMUTERS

  7. System Workflow Travel Times CMS Loop detectors & speed radars ETC readers MITTENS SOCCS ElementaryTravel Times CMS messages Route travel times reconstruction Configuration and scheduling Real-time control Business rules D4 TMC

  8. Presentation Outline • Program Overview • System Capabilities • Evaluation and User Feedback

  9. TRAVEL TIME TO SF DWNTWN -- MIN SFO ARPT -- MIN TRAVEL TIME TO SF DWNTWN 10 MIN SFO ARPT 23 MIN Real-time display Current “Mask” Data User model (1) Processing ? Dynamic field Business Rules

  10. TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN User model (2) CMS Configuration Masks Schedule TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN CMS 1 Configuration TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN Default masks TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN CMS 2 B A Routes TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN TRAVEL TIME TO LORM IPSM -- MIN LORM IPSM -- MIN CMS 3 Displays

  11. User Interfaces to MITTENS From the operator’s point of view controlling the TT messages will feel the same as using SOCCS GUI to control the CMS • Monitor TT Messages • Turn On/Off • Change TT Messages • Define TT Messages • Monitor System • Reset MITTENS Administrator Operator Operator GUI Administrator GUI SOCCS GUI TRAVEL TIME TO SF DWNTWN 10 MIN SFO ARPT 30 MIN MITTENS SOCCS Travinfo 511

  12. Admin GUI: Creating a Mask List of all CMS in the system Example: Select CMS 12

  13. Creating a Mask - Select a Message Type Dropdown menu of message templates available based on CMS Type Example: Select Two Route Travel Times

  14. Creating a Mask - Enter the Text to Display Dropdown menu of routes available from CMS 12 Example: Select SF DWNTWN and OAKLAND

  15. Creating a Mask - Define Mask Name and ID Mask ID is automatically generated but can be edited by the user Example: Enter Mask Name

  16. Creating a Mask - Confirm Mask Creation User views the formatted travel time message Example: Confirm the creation of the mask

  17. Operator GUI: View Current Messages

  18. Operator GUI: Select Alternative Message

  19. Upcoming feature: Public Transit Information SJ –FWY 45 MIN SJ -TRAIN 32 MIN NEXT TRAIN 08:30

  20. Upcoming feature: Travel Times + Incident Msg. Next Steps • Scheduling different destinations for a special event • Setting up MITTENS to respond to certain traffic conditions • Displaying travel times with traffic incident messages Work with operators to take advantage of the new features: SF DWNTWN 32 MIN OAKLAND 29 MIN SFO ARPT 45 MIN STALLED VEHICLE LEFT 2 LANES CLOSED

  21. Presentation Outline • Program Overview • System Capabilities • Evaluation and User Feedback

  22. Evaluation Components • Validation of travel time estimates • Confirm 511 accuracy on selected routes to display • Verify similitude of estimates on CMS and 511 phone system • Validation conducted in April 2005 • Impact on freeway speeds • Traffic study in PeMS • Linear regression to correlate speed @ CMS with display / no display • Commuter response: survey • 1,000 respondents • 2/3 online through 511 website • 1/3 mail-in recruited at casual carpool pick-up locations

  23. Impact on Freeway Speeds: Methodology

  24. Survey results (1) On a scale 1 to 5, how useful are the travel time messages?

  25. Survey results (2) On a scale 1 to 5, how accurate are the travel time messages?

  26. Survey results (3) Does displaying 3 destinations on one sign provide too much information while driving?

  27. Displaying travel times on Changeable Message Signs in the SF Bay Area JD Margulici & Samuel Yang, CCIT ITS America’s 2007 Annual Meeting & Exposition – Session #5 Thank You!!

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