Trade-Off Between Delineation and Lighting on Freeway Interchanges: Investigation of Transient Visual Adaptation

Hostetter, Robert S.; Carter, R. G.; Dauber, G. W.

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Trade-Off Between Delineation and Lighting on Freeway Interchanges: Investigation of Transient Visual Adaptation

1993-11-01
By Hostetter, Robert S. ; Carter, R. G. ; Dauber, G. W.

File Language:

English

Details

Creators:

Hostetter, Robert S. ; Carter, R. G. ; Dauber, G. W.
Corporate Creators:

IFR Applications, Inc.
Contributors:

Arens, John B.
Corporate Contributors:

United States. Federal Highway Administration. Office of Safety and Traffic Operations R&D
Subject/TRT Terms:
Publication/ Report Number:

FHWA-RD-91-041
Resource Type:

Tech Report
Right Statement:

Public Domain
Geographical Coverage:

United States
Edition:

Final Report
Contracting Officer:

Arens, John B.
Corporate Publisher:

United States. Federal Highway Administration. Office of Safety and Traffic Operations
Abstract:

The objective was to determine the extent that transient visual adaptation (TVA) affects drivers' detection of targets along partially lighted freeway interchanges. The study expanded a preliminary task on TVA described in publication FHWA-RD-88-223. Twenty-five subjects drove 10 trials on an entrance and an exit ramp. Lighting was manipulated to provide trials in darkness, and with one, two, three, and four luminaires lighted along each ramp. The same drivers returned for a second session of 10 trials, when refractors were replaced with sharp cut-off luminaires (low glare). The drivers pressed a button on a hand-held switch when they detected the 7-in. by 7-in. (17.8-cm by 17.8-cm) gray targets placed on the shoulder at 350 ft (106.75 m) or 475 ft (144.88 m) downstream of the final ramp luminaire. The vehicle computer recorded distances between subjects and targets at the instant of detection.
Format:

PDF
Funding:

DTFH61-85-C-00137
Download URL:

https://rosap.ntl.bts.gov/view/dot/89301/dot_89301_DS1.pdf
File Type:

[PDF - 1.47 MB]
Collection(s):

Federal Highway Administration
Main Document Checksum:

urn:sha-512:820389e8d1f3df223b9706ab5d49e3e1116b52981667e167e71cbb5f41ed1501a31b6440e69fdf1c0bf047f00ae9db1d4095abf360d4a5adf4be69dda097bbcf

File Language:

English

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