Limited sight distance warning for vertical curves

Freedman, Mark; Staplin, L. K.; Decina, Lawrence E.; Farber, Eugene I.; Ketron, Inc.

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Limited sight distance warning for vertical curves

1984-11-01
By Freedman, Mark ; Staplin, L. K. ; Decina, Lawrence E. ; ...

[PDF-2.87 MB]

English

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Creators:

Freedman, Mark ; Staplin, L. K. ; Decina, Lawrence E. ; Farber, Eugene I.

Freedman, Mark ; Staplin, L. K. ; Decina, Lawrence E. ; Farber, Eugene I. Less -
Corporate Creators:

Ketron, Inc.
Corporate Contributors:

United States. Federal Highway Administration. Office of Research. Systems Technology Division
Subject/TRT Terms:

[+]

Highway Curves Sight Distance Warning Signs
Publication/ Report Number:

FHWA-RD-85-046
Resource Type:

Tech Report
Edition:

Final technical report
Contracting Officer:

Roberts, King M.
Corporate Publisher:

United States. Federal Highway Administration. Offices of Research and Development
NTL Classification:

NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION
Abstract:

This is a summary of the procedures and findings of a study of highway signs to warn of restricted sight distance due to crest vertical curves. Driver awareness, understanding, and response to the existing LIMITED SIGHT DISTANCE (LSD) sign and several alternative signs were measured. Following a study of performance requirements, a large number of preliminary alternative sign designs were tested in a laboratory setting. Further laboratory testing of the five most promising designs was conducted to asses. driver comprehension and assimilation. The two most promising verbal and symbol alternative. were next eV6luated in a controlled field study and an observational field study, conducted at several vertical curves on two-lane rural roads." The controlled study indicated that both o. the alternative signs - one"with the legend SLOW HILL BLOCKS VIEW and the other with a symbol in combination with that message - were superior to the LSD sign. Th~ symbol sign with the supplementary legend SLOW HILL BLOCKS VIEW is recommend.d to replace the existing LSD (MUTCD Wl4-4) sign.
Format:

PDF
Funding:

DTFH61-82-C-00062
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:b6529d48c1769e45e1eb4c0e1e949d7f941f152e92d7795b2f009986fe78d5c8
Download URL:

https://rosap.ntl.bts.gov/view/dot/1011/dot_1011_DS1.pdf
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No Additional Files

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Limited sight distance warning for vertical curves

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