THE TRAJECTORIES OF PEDESTRIANS, MOTORCYCLES, MOTORCYCLISTS ETC FOLLOWING A ROAD ACCIDENT
For many years accident investigators have been faced by the problem of estimating the projection velocity associated with a given trajectory. The most recent contributions to this topic were two papers at the 1981 AAAM but these, like earlier work, deal only with the aerial part of the trajectory, until the object first lands. In most accidents however the point of first landing cannot be determined and it is the point at which the object comes to rest which is recorded. The present paper derives an equation for the projection velocity associated with a given total trajectory. Using this equation it is possible to bracket the limits within which the projection velocity must lie, even when the angle of projection is unknown. In order to facilitate the use of this approach, data have been obtained on the frictional coefficients. This information is compared with existing field data on pedestrian trajectories. It is found that these pedestrian trajectories correspond to only a percentage of the full velocity of the vehicle. This percentage is large for children struck by vehicles with high front ends, approaching 100%, but is significantly less for adults and for vehicles with low fronts. For the covering abstract of the conference see HS-036 716. (Author/TRRL)
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Supplemental Notes:
- Twenty-Seventh Stapp Car Crash Conference Proceedings (P-134) with International Research Committee on Biokinetics of Impacts (IRCOBI), San Diego, California, October 17-19, 1983.
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Corporate Authors:
Society of Automotive Engineers (SAE)
400 Commonwealth Drive
Warrendale, PA United States 15096 -
Authors:
- Searle, J A
- Searle, A
- Conference:
- Publication Date: 1983
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 277-286
Subject/Index Terms
- TRT Terms: Adults; Bumpers; Children; Conferences; Crashes; Equations; Hoods; Itinerary; Mathematical models; Motorcycles; Motorcyclists; Pedestrians; Speed; Traffic crashes; Trajectory; Vehicle trajectories
- Old TRIS Terms: Projection velocity
- ITRD Terms: 1747: Adult; 1347: Bonnet (car); 1352: Bumper; 1758: Child; 1631: Collision; 8525: Conference; 699: Itinerary; 6473: Mathematical model; 1221: Motorcycle; 1752: Motorcyclist; 1733: Pedestrian; 5408: Speed
- Subject Areas: Highways; Pedestrians and Bicyclists; Safety and Human Factors; I80: Accident Studies; I84: Personal Injuries;
Filing Info
- Accession Number: 00387094
- Record Type: Publication
- Source Agency: Institute for Road Safety Research, SWOV
- Report/Paper Numbers: SAE 831622, HS-036 736
- Files: HSL, ITRD, TRIS
- Created Date: Jul 30 1984 12:00AM