Quasi-induced exposure: Methodology and insight

被引:109
作者
Stamatiadis, N
Deacon, JA
机构
[1] Department of Civil Engineering, University of Kentucky, Lexington
关键词
quasi-induced exposure; accident propensity; relative accident ratios; accident time and location; single-vehicle accidents;
D O I
10.1016/S0001-4575(96)00060-7
中图分类号
TB18 [人体工程学];
学科分类号
1201 ;
摘要
Even though the numerator in accident rates can be accurately determined nowadays, the denominator of these rates is an item of discussion and debate within the highway safety community. A critical examination of an induced exposure technique, based on the non-responsible driver/vehicle of a two-vehicle accident (quasi-induced exposure), is presented here. Differences in exposure for a series of accident location and time combinations are investigated, the assumption of similarities between drivers of single-vehicle accidents and the responsible driver of multiple-vehicle accidents is refuted, and the use of the non-responsible driver as a measure of exposure is tested using vehicle classification data. The results of the analyses reveal the following: (1) accident exposure is different for different location and time combinations; (2) induced exposure estimates provide an accurate reflection of exposure to multiple-vehicle accidents; (3) induced exposure estimates are acceptable surrogates for vehicle miles of travel when estimates are made for conditions during which the mix of road users is fairly constant; and (4) the propensity for involvement in single-vehicle accidents is generally different than that in multiple-vehicle accidents for a given class of road users. We concluded that the quasi-induced exposure is a powerful technique for measuring relative exposure of drivers or vehicles when real exposure data are missing. Copyright (C) 1997 Elsevier Science Ltd.
引用
收藏
页码:37 / 52
页数:16
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