Proceedings of the 2018 7th International Conference on Energy, Environment and Sustainable Development (ICEESD 2018)

Analysis of left-turn crash using Poisson Regression model at unsignalized intersections

Authors
Liyan Qin, Yan Lu, Shuai Zhang
Corresponding Author
Liyan Qin
Available Online May 2018.
DOI
https://doi.org/10.2991/iceesd-18.2018.94How to use a DOI?
Keywords
unsignalized intersection; left-turn crash; Possion regression model; short left lane
Abstract

The purpose of this study is to explore the safety performance of short left-turn lanes at unsignalized intersections, where it is often impractical to provide the standard lengths either when the available length between two adjacent opening is inadequate or when heavy left-turn volumes leads to demanding lane length. Left-turn crash data of six years from Houston, Texas of the years 2006-2011 were collected. There were thirty-nine lanes shorter than the standard requirements and thirteen lanes meeting the requirements. A Poisson Regression model was developed to relate traffic and geometric attributes to the total count of rear-end, sideswipe, and object-motor vehicle accidents at a left-turn lane. Furthermore, Crash Modification Factors (CMFs) were calculated for future applications in projecting the crash frequency given a specific change of the lane length. The results shows that short left-turn lanes have negative safety impacts. The study finally puts forward the opinion to improve the present conditions at the left-turn unsignalized intersection.

Copyright
© 2018, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

Volume Title
Proceedings of the 2018 7th International Conference on Energy, Environment and Sustainable Development (ICEESD 2018)
Series
Advances in Engineering Research
Publication Date
May 2018
ISBN
978-94-6252-503-0
ISSN
2352-5401
DOI
https://doi.org/10.2991/iceesd-18.2018.94How to use a DOI?
Copyright
© 2018, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Liyan Qin
AU  - Yan Lu
AU  - Shuai Zhang
PY  - 2018/05
DA  - 2018/05
TI  - Analysis of left-turn crash using Poisson Regression model at unsignalized intersections
BT  - Proceedings of the 2018 7th International Conference on Energy, Environment and Sustainable Development (ICEESD 2018)
PB  - Atlantis Press
SP  - 520
EP  - 526
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceesd-18.2018.94
DO  - https://doi.org/10.2991/iceesd-18.2018.94
ID  - Qin2018/05
ER  -