Corridor Congestion Management
Innovation for better mobilitysm
Innovation for better mobilitysm
Congestion and the Incident Problem
Demand > Capacity = Congestion Incidents limit capacity Incidents in bottleneck section
severely limit capacity
Innovation for better mobilitysm
Congestion
Incident congestion is self-feeding Congestion is time-dependent Queue blocks access by emergency
responders Lack of incident management slows
response, creating more congestion
Innovation for better mobilitysm
Incident Management
Identification Verification Response
Innovation for better mobilitysm
Incident Identification
Cell phones most effective Traffic sensors less effective on
signalized arterials
Innovation for better mobilitysm
Incident Verification Questioning cell callers
Location identification problems Monitoring video
Allows responders to view incident directly
Traffic flow sensing Good for measuring traffic impacts Ineffective for supporting emergency
response
Innovation for better mobilitysm
Incident Response
Emergency response Identify capacity constraint Estimate of traffic flow impact Mitigate congestion
Innovation for better mobilitysm
Emergency Response
With limited information, full response is called
Full response blocks entire roadway Incident management provides
measured response Measured response minimizes impact
Innovation for better mobilitysm
Congestion Mitigation
Reduce capacity constraints Measured emergency response Quick emergency response
Reduce demand Demand shift in space or time Motorist and traveler information
empowers travelers to make better network use decisions and adjust plans
Innovation for better mobilitysm
Motorist and Traveler Information
Objective: Shift demand Diversion
Supported by dynamic message signs, highway advisory radio
Signs located upstream of diversion routes around worst bottlenecks
Departure time Supported by web page Media alerts Highway advisory radio
Innovation for better mobilitysm
Limitations on Diversion
Limited diversion capacity Diversion not specified on signs Diversion limited to locally-aware
motorists
Innovation for better mobilitysm
Tool-of-the-Trade LPR – FL Case study Toll Tag Readers VII FHWA - timestamp, weather, vehicle
position, speed, braking and acceleration
Cell phone tracking
Innovation for better mobilitysm
Tools-of-the-Trade Red Light Running LEDs and improved pavement marking Video Surveillance, Traffic Monitoring Improved hardware and software at
intersections Improved communication to the intersections Improved timing at the intersections Ramp Metering ATIS - 511