00756152

Component

https://doi.org/10.3141/1635-22

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

Nearly 42% of traffic accidents on urban roads in Riyadh, the capital of Saudi Arabia, were attributed to speeding. Compared to U.S. data, this developing country has 4.5 times more accidents due to speed. In this study, spot speed data were analyzed using data collected at 13 urban roadway sections in Riyadh. Five of the study sites were freeway sections, and eight were arterial sections. Speed characteristics, including mean, variance, and 85th percentile, were investigated. The study found that obtaining the 85th speed percentile from regression modeling gives much better estimates than those from the normal approximation model. Driver noncompliance with the posted speed limit was clearly shown. At some sites, more than 90% of motorists were exceeding the speed limit, indicating that much more active speed limit enforcement is needed.

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. 162-170

1998

Transportation Research Record

0309065070

Figures (7) ; References (12) ; Tables (8)

85th percentile speed; Arterial highways; Behavior; Compliance; Data collection; Drivers; Freeways; Mean (Statistics); Speed limits; Speeding; Spot speed; Streets; Traffic crashes; Traffic speed; Urban areas; Variance

Riyadh (Saudi Arabia)

Riyadh (Saudi Arabia)

Highways; Safety and Human Factors; I83: Accidents and the Human Factor

TRIS, TRB

Nov 10 1998 12:00AM

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