Guidelines for Dual-Advisory Speed Signing on Freeway-to-Freeway Connectors in Texas

Voigt, Anthony P.; Stevens Jr, Charles Robert; Borchardt, Darrell W.

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Guidelines for Dual-Advisory Speed Signing on Freeway-to-Freeway Connectors in Texas

2007-07-01
By Voigt, Anthony P. ; Stevens Jr, Charles Robert ; Borchardt, Darrell W.

File Language:

English

Details

Creators:

Voigt, Anthony P. ; Stevens Jr, Charles Robert ; Borchardt, Darrell W.
Corporate Creators:

Texas A&M University System. Texas Transportation Institute
Corporate Contributors:

Texas Department of Transportation. Research and Technology Implementation Office ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Freeway Management Systems Freeway Operations Highway Curves Ramps (Interchanges) Rollover Crashes Speed Signs Steering Traffic Speed
Publication/ Report Number:

FHWA/TX-07/0-4813-1
Resource Type:

Tech Report
Geographical Coverage:

United States ; Texas
Corporate Publisher:

Texas. Department of Transportation
Abstract:

This project recognizes the disparity in the relationship between truck and passenger car speeds and current advisory speed signing practices. The results of this project provide a mechanism that traffic engineers may use to provide enhanced differential warning to trucks and passenger vehicles at freeway connector maps. Considering the strong evidence that there is a significant differential between speeds that cars and heavy trucks can comfortable and safety traverse freeway connector ramps, there was a need for further research to investigate the current advisory speed signing practices and to examine whether a dual-advisory speed signing scheme, one that provides different recommended advisory speeds for trucks and passenger vehicles, can safely address this differential. Based on the results of the analysis of average and 86th percentile speeds at the midpoint of each study curve, the dual-advisory warning signs generally had a positive impact on reducing speeds at the point of curvature on the curve and/or having an accompanying reduction in speed-related crashes at the study site.
Format:

PDF
Funding:

0-4813
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:b4b2fce5642aa6a45dc9e047e1aaff130020bc4717db315cfbdfe6a45e35bb78e7f993c219b2e0d021418b5b31a25328e9254af5a2a9d8d70e1be3bc08d138dc
Download URL:

https://rosap.ntl.bts.gov/view/dot/88575/dot_88575_DS1.pdf
File Type:

[PDF - 1.85 MB ]

File Language:

English

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