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I-270/MD 355 Simulator: An Intelligent Online Traffic Management System

An online traffic management system for incident management, queue length prediction, travel time estimation, and evaluating detour operations.

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I-270/MD 355 Simulator: An Intelligent Online Traffic Management System

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  1. I-270/MD 355 Simulator: AnIntelligent Online Traffic Management System Dr. Gang-Len Chang Nan Zou Xiaorong Lai University of Maryland Saed Rahwanji Maryland State Highway Administration

  2. Functions • Incident Management Functions • Estimating the incident duration and the maximum impact range • Predicting the dynamic evolution of queue length • Estimation of travel time vs. departure time during the period of incident management • Evaluating the effectiveness of detour operations

  3. Functions • Incident Management Functions • Estimating the incident duration and the maximum impact range • Predicting the dynamic evolution of queue length • Estimation of travel time vs. departure time during the period of incident management • Evaluating the effectiveness of detour operations

  4. Functions • Incident Management Functions • Estimating the incident duration and the maximum impact range • Predicting the dynamic evolution of queue length • Estimation of travel time vs. departure time during the period of incident management • Evaluating the effectiveness of detour operations

  5. Functions • Incident Management Functions • Estimating the incident duration and the maximum impact range • Predicting the dynamic evolution of queue length • Estimation of travel time vs. departure time during the period of incident management • Evaluating the effectiveness of detour operations

  6. Functions • Incident Management Functions • Estimating the incident duration and the maximum impact range • Predicting the dynamic evolution of queue length • Estimation of travel time vs. departure time during the period of incident management • Evaluating the effectiveness of detour operations

  7. Functions (cont’d) • Additional functions • Changing signal timings • Changing the acceleration and deceleration lanes • Ramp closure or ramp metering • Automatic update of traffic volume from real-time data

  8. Functions (cont’d) • Additional functions • Changing signal timings • Changing the acceleration and deceleration lanes • Ramp closure or ramp metering • Automatic update of traffic volume from real-time data

  9. Functions (cont’d) • Additional functions • Changing signal timings • Changing the acceleration and deceleration lanes • Ramp closure or ramp metering • Automatic update of traffic volume from real-time data

  10. Functions (cont’d) • Additional functions • Changing signal timings • Changing the acceleration and deceleration lanes • Ramp closure or ramp metering • Automatic update of traffic volume from real-time data

  11. Functions (cont’d) • Additional functions • Changing signal timings • Changing the acceleration and deceleration lanes • Ramp closure or ramp metering • Automatic update of traffic volume from real-time data

  12. Example Scenario • Date: August 8th, 2003 • Time: 9:25AM • Location: 2500 feet south of Exit 4 • Traffic Direction: South • Lane Blockage: 2 right lanes closed

  13. Activate the accident module of the system

  14. Map navigation function Use arrow buttons to navigate the covered area

  15. Zoom in the map view

  16. Identify the incident location

  17. Select the traffic direction: South Bound

  18. Next Question

  19. Input the distance from the incident location to Exit 4

  20. Next Question

  21. Click on the road to mark blocked lanes

  22. Criteria to search similar cases in the knowledge base 2 similar cases from the knowledge base Time information for the current incident Estimate the incident duration based on the historical data Search similar cases at all locations

  23. 132 similar cases from the knowledge base Search similar cases for Collision, Personal Injury

  24. 52 similar cases from the knowledge base Set the duration of the current incident to 50 minutes

  25. Save the duration and continue

  26. Change the duration of the simulation

  27. Next step

  28. This screen shows the summary of the information for the current incident Execute the simulation

  29. New data from detectors are available.

  30. Update volume data

  31. Simulation started!

  32. Two types of chart display Display the outputs for both I-270 and MD 355 Four categories of output Display the output chart for the selected time period Display the output chart for selected segment Display outputs by segment or over time Map-based output Animation output This is the output screen Display the bar chart

  33. Set the time period to 9:20 to 10:20

  34. Show the output for MD355

  35. Display the delay over time on MD 355 segment from Shady Grove Rd to Grosvenor Ln

  36. Display the output of average speed

  37. Display the output by segment

  38. Display the output of the average speed by segment for I-270

  39. Display the output for distribution of the queue length

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