Corridor Congestion Management Innovation for better mobility sm

Congestion and the Incident Problem  Demand > Capacity = Congestion  Incidents limit capacity  Incidents in bottleneck section severely limit capacity

Innovation for better mobility sm 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 mobility sm Incident Management  Identification  Verification  Response

Innovation for better mobility sm Incident Identification  Cell phones most effective  Traffic sensors less effective on signalized arterials

Innovation for better mobility sm 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 mobility sm Incident Response  Emergency response  Identify capacity constraint  Estimate of traffic flow impact  Mitigate congestion

Innovation for better mobility sm 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 mobility sm 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 mobility sm 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 mobility sm Limitations on Diversion  Limited diversion capacity  Diversion not specified on signs  Diversion limited to locally-aware motorists

Innovation for better mobility sm 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 mobility sm 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