@article{ref1,
title="Practical Method for Estimating Frequency of Right-Angle Collisions at Traffic Signals",
journal="Transportation research record",
year="2006",
author="Songchitruksa, Praprut and Tarko, Andrew P.",
volume="1953",
number="",
pages="89-97",
abstract="Statistics indicate that accidents at signalized intersections have become a significant safety problem throughout the United States. Right-angle collisions are ranked highest in terms of severity at signalized intersections, while their frequency is second only to rear-end collisions. One key component that is lacking is a tool to help identify excessive risk of right-angle collisions. This paper proposes a practical method to evaluate the frequency of right-angle collisions on the basis of the frequency of short postencroachment times (PET). PET and crash data collected from signalized intersections in Indiana were used to calibrate right-angle crash prediction models. Regression results reveal that PET frequency is a key determinant of right-angle crashes and is capable of discriminating varying safety levels within a location as well as across locations. Several evaluation examples are presented to illustrate how the method can be used and how the estimation results can be interpreted.<p />",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}