00756148

Component

https://doi.org/10.3141/1635-18

http://scholar.google.com...LMAN&publication_year=1998

The efficiency of bollards - soft plastic post delineators which are installed at exit gore areas of some highways in Israel - is considered. The devices are expected to contribute to better arrangement of traffic streams and to reduce erratic vehicle maneuvers at highway exits. The treatment was examined in three ways: (1) a review of current experience concerning delineation techniques and tools for safety enhancement at exit gore areas, (2) a detailed consideration of accidents occurring on freeways with emphasis on specifics relevant to exit area occurrences, and (3) field observations of driver behavior at exit areas before and after bollard installation. The literature review showed that use of bollards for highway traffic arrangements has not been investigated closely, at least over the past 20 years. However, practice demonstrated that different kinds of delineation treatments did contribute to better traffic operations and decreased the number of erratic maneuvers at exit area approaches. A detailed consideration of accidents for two highways revealed that the accidents occurring at "exit" and "on" areas are a major part of interchange area accidents (69%), while explicit "gore area crossing" maneuvers appear only in six cases (23% of exit accidents). In total, a potential benefit of bollard application could be relevant to 11% of the accidents. Field observations of driver behavior were conducted for two sites. The comparison proved a significant reduction in erratic maneuver rates after the treatment: up to 60% in daytime and up to 65% at nighttime. Finally, the bollard treatment was recommended for use at freeway exits.

This paper appears in Transportation Research Record No. 1635, Safety Analysis Related to Highway Design, Crash Costs, and Traffic Records Systems; Methodologies for Evaluating Safety Improvements.

English

p. 133-139

1998

Transportation Research Record

0309065070

Figures (3) ; Photos (1) ; References (10) ; Tables (5)

Before and after studies; Behavior; Bollards; Crashes; Drivers; Field studies; Gore area; Guides to the literature; Highway delineators; Interchange ramps; Interchanges; Literature reviews; Problem drivers; Reckless drivers

Israel

Israel

Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control; I81: Accident Statistics

TRIS, TRB, ATRI

Nov 10 1998 12:00AM

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