The volume, the first of a three-volume final report, describes the relationship between intersection geometry and traffic and the motor-vehicle accident rates for groups of intersections sharing common design features. The analysis was based on a relatively detailed on-scene inventory of the geometry, design features, and traffic counts of 558 intersections coupled with police reports of the 4372 accidents that occurred in those areas during the three-year study period. Forty-one accidents were investigated in-depth by a multidisciplinary team to determine causal factors and to evaluate the effects of federal safety standards on intersection accident incidence and severity. Six design features were found to be accident-related--sight-distance obstructions, street-name signs, left-turn storage lanes, raised-marker delineation, bus stops and routes, and multiphase signalization. Countermeasures based on the influence of these six factors are recommended.
Motor Vehicle Accidents in Relation to Geometric and Traffic Features of Highway Intersections. Volume I. Executive Summary
1975
28 pages
Report
No indication
English
Transportation Safety , Road Transportation , Motor vehicle accidents , Intersections , Collision research , Geometry , Configuration , Vehicular traffic , Traffic surveys , Accident investigations , Safety engineering , Traffic safety , Standards , Highway transportation , Urban areas , Accident rates , Accident causes
Engineering Index Backfile | 1924
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