01334178

Component

This research study applied the detailed vehicular data available in an IntelliDrive℠ environment to address signal system inefficiencies that result from spillback during oversaturated conditions. New algorithms were developed to: (1) monitor queues in real-time, using the location and speed data from IntelliDrive℠-equipped vehicles; and then (2) modify the offset and splits at the upstream intersection, also in real-time. In short, the green phase for the affected approach is either delayed or cut short, as dictated by the real-time queue length on the downstream link. Further, additional time available from the affected approach is transferred to the opposite approach. The algorithms were evaluated using VISSIM microscopic traffic simulations on a 2-intersection test network with one-way streets. Results indicate the following significant network performance improvements: 13.4% more throughput, 26.5% less delay and 40.9% fewer stops.

01329018

11-2649

English

17p

2011

Transportation Research Board 90th Annual Meeting

DVD

Figures (6) ; References (22) ; Tables (1)

Arterial highways; Intersections; Real time information; Traffic oversaturation; Traffic queuing; Traffic signal cycle; Traffic simulation

IntelliDrive (Program); VISSIM (Computer model)

Spillback effects (Traffic)

Highways; Operations and Traffic Management; I73: Traffic Control

Transportation Research Board Annual Meeting 2011 Paper #11-2649

TRIS, TRB

Feb 17 2011 6:14PM