01336681

Component

https://doi.org/10.3141/2243-17

http://scholar.google.com...mith&publication_year=2011

Freeway merge conflicts contribute significantly to freeway congestion. With the capabilities that will be available in an IntelliDrive environment, which enables vehicle-to-vehicle and vehicle-to-infrastructure communications, new approaches to managing freeway merges are possible. In this paper, an enhanced IntelliDrive enabled lane changing advisory algorithm was developed with a variable gap size concept. This algorithm first calculates anticipated lead–lag gap sizes with the equations of motion prepared for a car and a truck and for three vehicle dynamics (accelerating, maintaining current speed, and decelerating). The algorithm then provides lane changing advisories to freeway main-line vehicles (selected on the basis of the calculated variable gap sizes) to create more space within the ramp merging area. Evaluation conducted with a VISSIM microscopic traffic simulation model of a freeway network in Virginia showed that the proposed algorithm has the potential to address freeway merge conflicts. The maximum operational improvement observed was 6.4% higher average speed in the freeway main line within a merge area. Up to a 5.2% reduction in emissions was achieved. Further analysis conducted in terms of the sensitivity of algorithm performance to driver compliance rates suggested that a very high compliance rate (90% or higher) was necessary for the proposed algorithm to work as intended.

01362318

11-2854

English

pp 146-157

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167635

Print

Figures (11) ; References (13) ; Tables (2)

Algorithms; Freeways; Gap acceptance; Highway operations; Lane changing; Merging traffic; Traffic conflicts; Traffic congestion; Traffic simulation; Vehicle to infrastructure communications; Vehicle to vehicle communications

IntelliDrive (Program); VISSIM (Computer model)

Virginia

Data and Information Technology; Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 17 2011 6:19PM

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