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

2. 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 Functions

3. 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 Functions

4. 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 Functions

5. 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 Functions

6. 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 Functions

7. 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 Functions (cont’d)

8. 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 Functions (cont’d)

9. 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 Functions (cont’d)

10. 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 Functions (cont’d)

11. 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 Functions (cont’d)

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

13. Activate the accident module of the system

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

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

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

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

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

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

51. View the segment between Exit 9 and Exit 1

52. Display the output of the travel time

53. Display the map-based output

56. Show speed information

59. Show speed information on MD 355

60. Change the speed for green color

62. View the animation of the simulation

63. Incident Location

64. Go back to output screen

65. Apply incident management strategies

66. Set the detour plan for the current incident

67. Input the information for the detour plan

68. Save input and continue

69. Change signal timings

70. Select the intersection

71. Select to edit the 2nd phase of the signal for this intersection

72. Change the maximum green time to 90 seconds

73. Save changes

74. Exit the signal timing function

75. Execute the simulation

76. Comparison of the travel time with and without the detour operation on I-270

77. Comparison of the travel time on I-270 using detour before and after the detour operation

78. Comparison of the travel time on I-270 between not choosing detour and choosing detour when the detour operation is applied

79. Update volumes Check the network balance Close ramps Change the length of auxiliary lane Additional Functions

80. Activate the function to Update Volumes

81. Select the intersection

82. Change the volumes

83. Check the network balance

84. Network is balanced now.

85. Activate the Management Functions

86. Manage the ramp

87. Close the ramp

88. Change the length of the auxiliary lane

89. Save and go back

90. Red circle: this ramp has been closed

91. Exit Management Functions

92. Future Research Areas Integrate the system with an optimization module that can assist engineers in selecting the most effective control plan Support more than one simulation server so as to save execution time Develop the web-based interface

93. Future Research Areas Integrate the system with an optimization module that can assist engineers in selecting the most effective control plan Support more than one simulation server so as to save execution time Develop the web-based interface

94. Future Research Areas Integrate the system with an optimization module that can assist engineers in selecting the most effective control plan Support more than one simulation server so as to save execution time Develop the web-based interface

95. Future Research Areas Integrate the system with an optimization module that can assist engineers in selecting the most effective control plan Support more than one simulation server so as to save execution time Develop the web-based interface

96. End of Presentation Thank you!