Download - Session 20 Daniel Furda, Bahareh Saffarian
Daniel Furda, Bahareh Saffarian
Linköpings universitet
Methods for work zone dynamic merge using traffic lights
3
Work zone classifications
• Duration of the work
• Type of the interaction between road and the work zone
• Work intensity
4
Work zone Layouts
• Advanced warning area
• Transition area
• Working(activity) area
• Termination area
Termination Area
Transition Area
Activity Area
Advanced Warning
Area
6
Work zone traffic performance analysis
• Mobility analysis( V/C, LOS, travel time delay)
• Safety analysis
• Delay and cost analysis
7
significant influential factors
• Heavy vehicle percentage
• Number of open and close lanes
• Work intensity
• Position of closed lanes
• Weather conditions
• Lane width
• Ramp distance
• Temporary speed limit
• Work zone length
10
Calibration of the model
• Driver reaction time = 0,5s
• Driver reaction time at stop = 0,7s
• Driver reaction time at lights = 0,7s
12
Assigned flow
0
500
1000
1500
2000
2500
3000
3500
Flow
(veh/h)
Simulation time (min)
15 30 45 60 75
16
Fixed cycle times
Cycle time (s)
Time
30 30
60 60
Lane 1
Lane 2
Lane 1
Lane 2
60
120
Lane 1
Lane 2
15 15
30
18
Fixed cycle times
5 15 25 35 45 55 65 75 850
50
100
150
200
250
300
AlineaFixed 120Fixed 60Fixed 30ContinNo control
5 15 25 35 45 55 65 75 85 950
50
100
150
200
250
300
350
Simulation time (min)
Mean Queue Length (veh)
Simulation time (min)
Delay Time per Vehicle (s)
19
Conclusion
• Extensive sensitivity analisys
• Evaluate the effect of lane-changing restrictions
• Calibration and validation of the model