SAFETYLIT WEEKLY UPDATE

We compile citations and summaries of about 400 new articles every week.
RSS Feed

HELP: Tutorials | FAQ
CONTACT US: Contact info

Search Results

Journal Article

Citation

Wang Z. Road Transp. Res. 2000; 9(4): 20-28.

Copyright

(Copyright © 2000, Australian Road Research Board)

DOI

unavailable

PMID

unavailable

Abstract

Two reference lines are used in gap acceptance data collection in this study. One is in the major road in order to record the arrival of the major road vehicles, the other one is the minor road to reference the exact instant of the arrival and departure of the merging/crossing driver. Gap data appear to be affected only by the different positioning of major road reference line, while lag data will be affected by both. Gap acceptance data collected with respect to different reference lines may, inevitably, be different. In order to evaluate these differences, this paper collected gap acceptance data according to different reference lines in both major and minor roads. The ARRB CAMera Data Acquisition System (CAMDAS) is used in this data collection process. The distributions and variances of available gaps (headways) and accepted gaps for different reference lines were evaluated. Critical gaps extracted from different reference-line scenarios were also examined. It was found that the distributions and variances of available gaps and accepted gaps are little affected by the positioning of reference lines. However, the difference for critical gaps may be as large as 0.9 s. This study provides some quantitative differences of gap acceptance data for different lines, and therefore may facilitate reference-line positioning in future gap acceptance studies.

Language: en

NEW SEARCH


All SafetyLit records are available for automatic download to Zotero & Mendeley
Print