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