00157798

Component

http://onlinepubs.trb.org...s/trr/1976/609/609-001.pdf

http://scholar.google.com...tson&publication_year=1976

This paper presents a survey of road curvature, superelevation, gradient, and number and distance from the roadway of roadside hazards conducted in Georgia at 300 sites of fatal crashes into fixed objects and at 300 comparison sites 1.6 km (1 mile) from the accident site. More than 26 percent of fatal crash sites and only 8 percent of comparison sites had road curvature greater than 6 deg combined with downhill gradient of -2 percent or less at or approaching the sites. Fifty percent of fatal crash sites and only 23 percent of comparison sites were at or near curves greater than 6 deg irrespective of gradient. A state study found that only 22 percent of roadways throughout the state had curvatures of more than 5.5 deg. Nonlocal roads accounted for 83 percent of the fatal crashes into fixed objects but comprised only 33 percent of the roads in the state. In 98 percent of the cases objects struck were within 15 m (50 ft) of the pavement edge. Top priority should be given to modification of roadside hazards on and near curves greater than 6 deg. particularly those on nonlocal roads where the downhill grades are -2 percent or less. /Author/

Publication of this paper sponsored by Group 3 Council. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411462

pp 1-8

1976

Transportation Research Record

0309025842

Digital/other

Figures (10) ; References (14) ; Tables (3)

Alternatives analysis; Fatalities; Hazards; Highway curves; Highway grades; Roadside; Single vehicle crashes; Slopes; Superelevation

Fixed object

Highways; Safety and Human Factors

TRIS, TRB

Sep 28 1977 12:00AM

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