01520335

Component

The development of surrogate safety measures is essential due to the problems of availability and quality of historical crash data. The Aggregate Conflict Propensity Metric (ACPM) is a surrogate metric recently proposed and it is based on conflict studies and traffic simulations. ACPM is expected to be capable of assessing the relative safety levels of traffic facilities and/or treatments in order to help traffic engineers to select appropriate treatments based on traffic safety estimates. This paper presents three experimental tests conducted to evaluate the reliability of ACPM. In each test, ACPM is compared to a traditional conflict indicator in terms of identifying and ranking safety of traffic conditions under various traffic volumes based on traffic simulations. ACPM shows its strength and reliability in all three tests, as it provides results highly consistent with the Highway Safety Manual. The experimental tests indicate that ACPM is a promising surrogate safety measure that can appropriately identify relative safety among traffic treatments and/or facilities and provide traffic engineers with useful information on potential safety impact.

This paper was sponsored by TRB committee ANB20 Safety Data, Analysis and Evaluation.

01503729

14-0777

English

15p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; References (25) ; Tables

Algorithms; Crash data; Highway safety; Safety; Safety engineering; Traffic conflicts; Traffic engineering; Traffic simulation; Traffic volume

Aggregate Conflict Propensity Metric

Design; Safety and Human Factors; I20: Design and Planning of Transport Infrastructure; I73: Traffic Control

Transportation Research Board Annual Meeting 2014 Paper #14-0777

TRIS, TRB, ATRI

Jan 27 2014 2:20PM