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

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

25. Zoom in the map view

26. Identify the incident location

27. Select the traffic direction: South Bound

28. Next Question

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

30. Next Question

31. Click on the road to mark blocked lanes

32. 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

33. 132 similar cases from the knowledge base Search similar cases for Collision, Personal Injury

34. 52 similar cases from the knowledge base Set the duration of the current incident to 50 minutes

35. Save the duration and continue

36. Change the duration of the simulation

37. Next step

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

40. New data from detectors are available.

41. Update volume data

42. Simulation started!

43. 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

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

45. Show the output for MD355

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

47. Display the output of average speed

48. Display the output by segment

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

50. Display the output for distribution of the queue length