00639989

Component

http://onlinepubs.trb.org...trr/1993/1403/1403-009.pdf

https://scholar.google.co...berg&publication_year=1993

Reflector posts are meant to increase optical guidance and help drivers see the road alignment ahead so that they can prepare for the driving task to come. It is often assumed that the additional visual cues provided by reflector posts also promote traffic safety. An experimental study on the effects of reflector posts was carried out on two-lane rural highways in Finland. On roads with 80-km/hr speed limits and relatively low geometric standards, the reflector posts increased driving speeds in darkness. The largest detected increases were 5 to 10 km/hr. The number of injury accidents in darkness increased by 40 to 60%. On roads with better geometric standards and 100-km/hr speed limits, the effects on driving behavior and accidents were small. The results indicate that reflector posts on narrow, curvy, and hilly roads can significantly increase driving speeds and accidents in darkness.

This paper appears in Transportation Research Record No. 1403, Driver Performance: Measurement and Modeling, IVHS, Information Systems, and Simulation. 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

00669186

English

p. 57-66

1993

Transportation Research Record

Figures (3) ; References (7) ; Tables (8)

Behavior; Crash rates; Drivers; Geometric design; Impact studies; Night visibility; Rural highways; Speed limits; Traffic safety; Two lane highways

Finland

Finland

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Dec 20 1993 12:00AM

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• DESIGN OF TRAVTEK AUDITORY INTERFACE
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• EYE SCANNING RULES FOR DRIVERS: HOW DO THEY COMPARE WITH ACTUAL OBSERVED EYE SCANNING BEHAVIOR?
• HIERARCHY OF SYMBOLIC COMPUTER-GENERATED REAL-TIME VEHICLE DYNAMICS MODELS
• MOTION ALGORITHM FOR LARGE-DISPLACEMENT DRIVING SIMULATOR
• MOTORIST INFORMATION NEEDS AND CHANGEABLE MESSAGE SIGNS FOR ADVERSE WINTER TRAVEL
• MOTORIST INTERPRETATION OF MUTCD FREEWAY LANE CONTROL SIGNALS
• PRESENTING DESCRIPTIVE INFORMATION IN VARIABLE MESSAGE SIGNING
• SUBSIDIARY TASK MEASURES OF DRIVER MENTAL WORKLOAD: A LONG-TERM FIELD STUDY