1 / 14

Improving Intercity Bus Reliability by Automatic Vehicle Location and

18 TH NATIONAL RURAL PUBLIC AND INTERCITY BUS TRANSPORTATION CONFERENCE. Improving Intercity Bus Reliability by Automatic Vehicle Location and Vehicle Infrastructure Integration. Chung-Jen Hsu Ph.D. student Advisor : Elizabeth G. Jones. 10/21/2008. Content. Introduction

mason-kramer
Télécharger la présentation

Improving Intercity Bus Reliability by Automatic Vehicle Location and

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 18TH NATIONAL RURAL PUBLIC AND INTERCITY BUS TRANSPORTATION CONFERENCE Improving Intercity Bus Reliability by Automatic Vehicle Location and Vehicle Infrastructure Integration Chung-Jen Hsu Ph.D. student Advisor : Elizabeth G. Jones 10/21/2008

  2. Content • Introduction • Bus Travel Time Analysis • Passenger Travel Time Analysis • Solution • System Architecture and Operation • Conclusion

  3. Introduction • Reliability is a key factor • Arrival Time Estimation • Previous Research Review • Systematic Approach • Automatic Vehicle Location (AVL) + • Vehicle Infrastructure Integration (VII)

  4. Bus Travel Time Analysis • Link travel time • Intersection delay time • Stop dwell time • Time-point waiting time Start End Stop Intersection Time Point

  5. Acceleration time TA = VC / a Deceleration time TD = VC / d Cruise time TC = (L – VC / 2a – VC / 2d) / VC Link travel time TL = TA + TC + TD VC : Cruise speed a : Acceleration rate d : Deceleration rate L : Link length

  6. TR = ∑ TL + ∑ TI + ∑ TS + ∑ TW TR : Route travel time TL : Link travel time TI : Intersection delay time TS : Stop dwell time TW : Time point waiting time

  7. Passenger Travel Time Analysis • Time to stop • Waiting time • Onboard time • Time to destination

  8. Solution • Accurate estimation of bus arrivals • Bus information accessibility by Internet, • cellular phone • Bus information provided at stops and on- • board

  9. Space G R G R Y R R G G G R G R Time Y Y Y Y Y Y Y

  10. DSRC Communication Range RSE : GPS Data Point : VII Data Line • VII DSRC Standard • SAE J2735 (draft) • VII snapshots • Stop/start • Depend on speed

  11. System Architecture and Operation • Database • Bus No. • Time • Longitude • Latitude • Calculate Travel time • Link No. , travel time • Stop No. , dwell/waiting time • Intersection No. , delay time • Bus GPS Data • Time • Longitude • Latitude VII Dwell Time DSRC • Electric Bus Stops • Route No. • Bus No. • Arrival time • Generate Stops Arrival Time • Route No. • Stop No. • Arrival time

  12. Cellular Network GPS Wireless Network IVR DSRC System Server Electronic Bus Stop Bus

  13. Conclusion • An innovative architecture of integrating AVL and VII technologies was proposed to improve intercity bus reliability. • Bus arrival time at each stop can be predicted with high precision with implementation of the system. • Electronic Bus Stop and backend Interactive Voice Response system provide accessible information to en-route passengers. • The system needs to be implemented to analyze the level of improvement to intercity bus reliability.

More Related