Citation

Raihan MA, Alluri P, Wu W, Gan A. Accid. Anal. Prev. 2019; 123: 303-313.

Affiliation

Department of Civil and Environmental Engineering, Florida International University, United States. Electronic address: gana@fiu.edu.

Copyright

(Copyright © 2019, Elsevier Publishing)

DOI

10.1016/j.aap.2018.12.009

PMID

30562669

Abstract

The objective of this study was to develop crash modification factors (CMFs) for bicycle crashes for different roadway segment and intersection facility types in urban areas. The study used four years (2011-2014) of crash data from Florida to quantify the safety impacts of roadway and traffic characteristics, bicycle infrastructure, and bicycle activity data on bicycle crashes. A cross-sectional analysis using Generalized Linear Model (GLM) approach with Zero Inflated Negative Binomial (ZINB) distribution was adopted to develop the relevant regression models in this study. Lane width, speed limit, and grass in the median were observed to have positive impacts on reducing bicycle crashes. On the contrary, presence of sidewalk and sidewalk barrier were found to increase the bicycle crash probabilities. Increased bicycle activity was found to reduce the bicycle crash probabilities on segments, while increased bicycle activity resulted in higher bicycle crash probabilities at intersections. Bus stops were found to increase the bicycle crash probabilities at intersections, whereas, protected signal control had a positive impact on bicycle safety. This research provides a greater insight into how various characteristics affect bicycle safety, a topic that is seldom considered by researchers and practitioners.

Copyright © 2018 Elsevier Ltd. All rights reserved.

Language: en

Keywords

Crash modification factor (CMF); Cross-sectional analysis; Crowdsourced bicycle activity data; Roadway characteristics; Zero inflated negative binomial