Impacts Assessment of Dynamic Speed Harmonization with Queue Warning: Task 3, Impacts Assessment Report

Dowling, R.; Skabardonis, A.; Barrios, J.; Jia, A.; Nevers, B.

doi:10.21949/1503774

i

Impacts Assessment of Dynamic Speed Harmonization with Queue Warning: Task 3, Impacts Assessment Report

2015-06-01
By Dowling, R. ; Skabardonis, A. ; Barrios, J.

File Language:

English

Details

Creators:

Dowling, R. ; Skabardonis, A. ; Barrios, J. ; Jia, A. ; Nevers, B.
Corporate Creators:

Kittelson & Associates, Inc
Corporate Contributors:

United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
Subject/TRT Terms:
Publication/ Report Number:

FHWA-JPO-15-222
DOI:

https://doi.org/10.21949/1503774
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Department of Transportation. Federal Highway Administration. Office of Operations ; United States. Federal Highway Administration. Office of Transportation Management ; United States. Federal Highway Administration. Office of Transportation Operations.
Abstract:

This report assesses the impacts of a prototype of Dynamic Speed Harmonization (SPD-HARM) with Queue Warning (Q-WARN), which are two component applications of the Intelligent Network Flow Optimization (INFLO) bundle. The assessment is based on an extensive analysis of the Prototype using a Vissim simulation model for the US 101 freeway corridor in San Mateo, CA as well as an evaluation of a small-scale demonstration that was conducted in Seattle, WA. Results from the simulation analysis found that the Prototype significantly reduces the magnitudes of the speed drops (shockwaves) between vehicles, even at the 10-percent market penetration level. This is considered to benefit safety by reducing the probability of collisions where free-flowing traffic meets the back of a queue. The trade-off for the improved safety is that the Prototype increases the geographic impact of existing bottlenecks on freeway speeds by expanding the upstream distance that is affected by congestion.
Format:

PDF
Funding:

D TFH61-12-D-00044-T-13001
Download URL:

https://rosap.ntl.bts.gov/view/dot/3554/dot_3554_DS1.pdf
File Type:

[PDF - 7.84 MB]
Collection(s):

Federal Highway Administration ; ITSJPO Digital Library
Main Document Checksum:

urn:sha-512:4f6eafdb7c6646cdabbbcd72c0254435d0937b306752af22f71537bbee47d673da079f67f05387417e2135e8e2067bd0d33ce0ee8fc79d97ddd3f5db0343cede

File Language:

English

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