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Vmuralidharan Presentation Transcript

  • 1. Area Traffic Control System implementation at Pune by V. Muralidharan Additional Director, Head CIG C-DAC, Thiruvananthapuram 695033 Email: murali@cdactvm.in
  • 2. Area Traffic Control System
    • Area traffic control system are traffic responsive system that use data from vehicle detectors and optimize traffic signal settings to reduce vehicle delays and stops
    • The system operates in a closed loop, evaluating the real time demand and properly updating network signal timings
  • 3. The Indian Scenario
    • Most of the traffic signal controllers installed across the Country are first generation, fixed time controllers
    • Only two cities (New Delhi and Pune) has the Area Traffic Control System (ATCS)
      • New Delhi - 63 Junction (imported from UK)
      • Pune - 38 Junctions (developed by C-DAC)
    • Even this is a very small percentage
  • 4. Disadvantages of Fixed time traffic signal controllers
    • The timing plans are based on historical data, which may not be an accurate reflection of typical conditions
    • The timing plans rapidly age and the benefits achieved decrease
    • The system cannot respond to unpredictable events
  • 5. Result of fixed time controller
    • Wasted Green time
    • Unresolved Queues
    • Minor Accidents at the intersection
  • 6. Major building blocks of ATCS
    • Traffic Signal Controller
    • Vehicle Detectors
    • Communication Network
    • Application Software
    • Central Control Station
  • 7. Traffic Signal Controller
  • 8. Vehicle Detection (Balgandharv Chowk, Pune) Stop line Loop for Straight going traffic Exit Loop for Right turning traffic
  • 9. ArTIC #1 ArTIC #2 ArTIC #3 ArTIC #n CCR Detector Detector Detector Detector Communication network DETCTOR CONTROLLER
  • 10. Central Control Station (CCS)
  • 11. Challenges in implementing ATCS on Indian roads
    • Traffic is not lane following
    • A vehicle entering the approach (upstream) on a particular lane need not maintain the same at the intersection
    • High mix of traffic
    • Uncontrolled side roads and on-street parking
    • Obtaining a correct measure of traffic count is highly complex
    • Data loss due to power failure
    • Network failure
    • Availability of funds
  • 12. Homogeneous, lane following traffic Typical flow on Indian Roads (A scene from Pune)
  • 13. Typical Indian Road Condition
    • There is not, physically, as much road space and roads are not always planned and designed for efficient traffic use
    • The roads are called upon to perform a wide variety of functions which includes non-traffic use
      • for example, the co-existence of market stalls and through traffic on the same road space
    • Segregated footpaths are often poorly provided or used for other purposes, forcing pedestrians to use the roadway
    • Vehicle growth rates are very high
    • Vehicle mix can cover a wide range of types and characteristics, from bicycles and bullock-carts to articulated trucks
  • 14. On Street Parking A typical parking pattern seen on Laxmi Road
  • 15. Typical corridors ( Laxmi Road, Pune)
  • 16. Addressing the Challenges
    • C-DAC developed a Composite Signal Control Strategy (CoSiCoSt) for distributed network model that address all typical Indian road conditions
    • Strategies are built into the system to guard against network failure, power failure etc.
    • Distributed control give high scalability. Phased implementation of the system is possible based on funds availability
  • 17. C-DAC ATCS Model Central Control Station (CCS) Stop line Detector Traffic Signal Controller Signal Lights Average Occupancy Signal Timings (Prediction) Signal Control Feedback (Signal Timings executed against the prediction)
  • 18. Characteristics of C-DAC ATCS
    • The average occupancy information is collected by the Traffic Signal Controller from the vehicle sensors at stop-line and exit at the respective intersections
    • Signal timings for the intersection is generated by the traffic signal controller
    • Lead time required for the decision to terminate or continue a green is typically 1 to 2 Sec.
    • Green time executed at the intersection is intimated the to CC for audit and update
    • CC computes the limits for green time for every approach for all the intersections in the network, based on the demand trend analysis
    • Traffic signal controller is given autonomy to terminate the green prematurely, if the demand does not satisfy the CC predicted value
    • The traffic signal controllers can operate in vehicle actuation during communication failure or isolated mode
    • Scalable from independent intersection-to-corridor control with distributed time synchronization-to-ATCS
  • 19. CoSiCoSt Network Model New Timings & Preferences Demand Intersection Controller Split Optimizer Split time modifier Translation Plan Detector Stage Timing, Stage Saturation, Speed info Performance Index / Offset Route Selection & Offset Optimizer Current Timings Preferences & Observations Area Optimizer Weights & Bias
  • 20. Scalability Vehicle Actuated Traffic Signal Controller / Urban Traffic Controller System (UTCS) Vehicle Actuated Corridor Control ATCS Camera SCMS VMS SCMS – Service Crew Monitoring System VMS – Variable Message Signs
  • 21. ArTIC #1 ArTIC #2 ArTIC #3 ArTIC #38 Camera Camera CCR Detector Detector Detector Detector GSM NETWORK SCMS SCMS Variable Message Sign Variable Message Sign Leased line Network (Data, Control & Video) Pune ATCS Configuration
  • 22. Project Area in Pune 38 Intersections Karve Road JM Road Laxmi Road Sivaji Road Tilak Road Bajirao Road Central Control Room ATCS Pune Project Area
  • 23. Project Area in Pune 38 Intersections Karve Road JM Road Laxmi Road Sivaji Road Tilak Road Bajirao Road Central Control Room
  • 24. Variable Message Sign (Swargate, Pune)
  • 25. Service Crew Monitoring System
  • 26. Photographs from Surveillance Camera Alka Talkies Junction, Pune
  • 27. Corridor performance report
  • 28. Traffic Flow
  • 29. Time space diagram
  • 30. Impact Analysis of ATCS in Pune
    • M/s. Consulting Engineering Services (India) Pvt. Ltd., Mumbai
    • Pre and Post implementation study
    Controller supply and installation
    • M/s Webel Mediatronics Ltd., Kolkata
      • 38 controllers and 136 vehicle sensor loops
  • 31. Measure of Effectives (MoEs) considered for evaluation of impact of ATCS
    • Average Travel Speed
    • Average Delay
    • Average Saving in Fuel
    • Average Saving in Time
  • 32. Summary of these MoEs
    • Average travel speed increase of - 2% to 12%
    • Reduction in average delay of - 11% to 30%
    • Estimated annual fuel savings in the year 2006 is about - Rs. 4.77 Crores
    • Estimated annual time saving benefits in the year 2006 is about - Rs. 0.83 Crores
    • Total annual saving in the year 2006 is about Rs. 5.60 Crores
    • Over all Increase in the Traffic Volume is 9.06%
  • 33. ATCS Pune
    • Project Jointly funded by DIT and Pune Municipal Corporation
    • Duration - 30 Months (January 2004 to June 2006)
    • Project Cost - Rs.597.68L
  • 34. Further Implementation
    • Jaipur
      • One corridor (9 junctions) on pilot scale
        • Implementation in final stage. Expected to be fully functional by the end of January 2007
    • Ahmedabad
      • Three corridors (31 junctions) on pilot scale
        • Detailed project report being prepared by M/s. Webel Mediatronics Ltd., Kolkata
  • 35. Agencies come forward for ATCS Technology
    • M/s. Webel Mediatronics Ltd., Kolkata
    • M/s. KELTRON, Thiruvananthapuram
    • M/s. Bharat Electronics Ltd., Bangalore
  • 36. Patents
    • A method for synchronizing Heterogeneous Road Traffic and System thereof
      • #1087/CHE/2005 dated 08/08/05
    • System and Method for Vehicle Identification
      • #1201/CHE/2005 dated 29/08/05
    • Distributed Time Synchronization of Road Traffic Signal Controllers using GPS
      • IP 2069/AFS/pgv (K&S Partners ref.)
  • 37. Paper Publishing
      • A Composite Signal Control Strategy for Indian Roads, Indian Highways, August 2006 issue of The Indian Roads Congress, New Delhi
  • 38. Paper Presentation
    • 7 th International Workshop
      • Transportation Planning & Implementation Methodologies for Developing Countries: Infrastructure Systems
    • Topic
      • Real-time Adaptive Traffic Control Systems for Indian Cities – Challenges and Solutions,Indian Institute of Technology Bombay,3 rd December 2006
  • 39. Thank You