TY  - JOUR
PY  - 1986//
TI  - Safety migration, the influence of traffic volumes, and other issues in evaluating safety effectiveness - some findings on conversion of intersections to multiway stop control
JO  - Transportation research record
A1  - Persaud, Bhagwant N.
SP  - 108
EP  - 114
VL  - 1068
IS  - 
N2  - Five issues of interest to safety management in general are addressed in the context of an examination of the safety effect of converting intersections from one-street-stopped to multiway stop control. On the first issue, the results support a long-held belief that the more accidents a site is expected to have, the more effective a safety measure is likely to be. This means that for affected measures, effectiveness (percent reduction in accidents) should not be specified as a single accident reduction factor as is currently the practice. Next, on the much debated question of whether improved safety at treated sites leads to a degradation in safety elsewhere, the findings suggest that this safety migration may indeed exist. Accordingly, safety benefits at treated sites should be weighed against any resulting degradation in safety elsewhere. On the other three issues, the findings are somewhat contrary to common belief. First, there is no evidence that conversion of intersections to multiway stop control is effective only for certain ranges of total entering volumes; neither is it apparent that effectiveness depends on how this volume is split among the approaches. Second, a learning period after conversion does not appear to be detrimental to safety. Finally, effectiveness does not decline as the use of this measure becomes widespread. Although all of these issues are addressed for a specific measure, some of the findings might be quite general.    Record URL:   http://onlinepubs.trb.org/Onlinepubs/trr/1986/1068/1068-015.pdf<p /> <p>Language: en</p>
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/
ID  - ref1
ER  -