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Optimalization of Traffic Management in cities based on Satellite Positioning System

Optimalization of Traffic Management in cities based on Satellite Positioning System. Prof. Dr. Pavel Pribyl. Characteristic of project. Research project No. 802/210/112 Founded by Ministry of Transport Proposed for 6 years (2001-2006)

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Optimalization of Traffic Management in cities based on Satellite Positioning System

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  1. Optimalization of Traffic Management in cities based on Satellite Positioning System Prof. Dr. Pavel Pribyl

  2. Characteristic of project • Research project No. 802/210/112 • Founded by Ministry of Transport • Proposed for 6 years (2001-2006) “Participation of the Czech Republic in the Galileo Project” • Optimalization of traffic management in the cities • New procedure based on queue length • Queue length estimation based on model and FC • Traffic accident automatic identification • GPS signal ability in the city corridors Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  3. Traffic control in the cities - detectors • Traffic Responsive Control • time gap between cars • presence (TRC) 40 m • Traffic adaptive control • macroscopic parameters • strategic (TAC) 100 m Level of services Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  4. Traffic control in the cities • Parameter  (LOS ,LDET) • Information power transferred to traffic controllers Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  5. Traffic control in the oversaturated networks • Queue length extension to the previous crossing • Blocking of collision directions • Domino effect 22. November 2004, 16 hours Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  6. New procedure of traffic control • Input parameters • queue length • priority of directions • capacity of stages • Procedure • Identification of an area • Lane priorities • Cycle time calculation • Offset calculation • Split optimalization Capacity of stage: Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  7. New procedure of traffic control - algorithm Queue length estimation FC data Cycle time calculation Split optimalization Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  8. Queue length by floating cars • Number of FC depends on accuracy of TT estimation • Probabilistic theory • Strakonická street – 1800 m, 2 traffic controllers • TT actualization in 15 minutes … 20 FC/90 % • Radlicka street – 500 m, 4 traffic controllers • … 36 FC Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  9. Queue length estimation – data and FC 1 2 3 4 5 6 Hybrid model - Time development of occupancy - Hydrodynamic analogy - Verification by FC • Legth of the queue of cars Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  10. Pilot evaluation – crossing Nr. 4.421 • Control algorithm based on queue length (simplified) • SSZ 4.421, traffic problems, queues in both direction • WiFi communication to the traffic centre Ordinary improvement in travel time 5-10 % Pilot project in the 2005 – 6 crossings Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  11. Floating car measurement (15 hours) Stationary measurement (2 x 24 hours) Measurement in the city corridors (1) • Evaluation • Number of satellites • Parameter DOP • Inaccuracy of position Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  12. Evaluation of FC Measurement in the city corridors (2) Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  13. Measurement in the city corridors (3) Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  14. Conclusions • The method of city management based on queues estimation is very actual • Reduction of number of FC is necessity but !!! • FC data for verification of queue length are essential • The experiences will be available before Galileo will be launched (… very important) Zpět Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

  15. Thank you Pavel Pribyl pribylp@eltodo.cz Pilot project: Optimalization of Traffic Management Based on Satellite Positioning System

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