Driver Interpretations of Existing and Potential Lane Control Signal Symbols for Freeway Traffic Management

Ullman, Gerald L.; Wohlschlaeger, Steven D.; Dudek, Conrad L.; Wiles, Poonam B.

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Driver Interpretations of Existing and Potential Lane Control Signal Symbols for Freeway Traffic Management

1993-11-01
By Ullman, Gerald L. ; Wohlschlaeger, Steven D. ; Dudek, Conrad L.

File Language:

English

Details

Creators:

Ullman, Gerald L. ; Wohlschlaeger, Steven D. ; Dudek, Conrad L. ; Wiles, Poonam B.
Corporate Creators:

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

Texas. Dept. of Transportation. Office of Research and Technology Transfer ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA/TX-93/1298-1
Resource Type:

Tech Report
Geographical Coverage:

United States ; Texas
Edition:

Final Report: September 1991 - August 1993
Corporate Publisher:

Texas Transportation Institute. Texas A&M University
Abstract:

This report documents the results of laboratory studies to assess motorist interpretations of the following symbols used or initially seen as potential freeway lane control signals: red X, yellow X, green downward arrow, yellow downward diagonal arrow, yellow downward arrow, circle-slash (i.e., the universal "do not" symbol), and a red X superimposed on a green arrow. The effects of flashing the red X, green arrow, and yellow arrows upon motorist interpretations were also evaluated. Results indicate that the red X and green arrow are well understood and convey a clear, consistent meaning to drivers. Also, the yellow diagonal arrow conveys a clear, consistent message to exit a lane. The yellow X and downward arrow elicited a wide range of interpretations by motorists, and these interpretations change depending on what other LCS symbols are present in an overall LCS array at a location. Flashing displays were not found to significantly affect motorist interpretations.
Format:

PDF
Funding:

0-1298
Download URL:

https://rosap.ntl.bts.gov/view/dot/82513/dot_82513_DS1.pdf
File Type:

[PDF - 6.73 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:d1ec46828eac901e36bafd3817833592c88952a5b1ced921cdc9c1765cd3f2bd213cef80fb2223f616515e431456acfae7d0a3fcd3c345b0150186e093da116f

File Language:

English

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