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Abstract for presentation (Poster or Podium) with a Paper in the Conference Proceedings

Transportation Safety

Motorcycle Crashes in California: Analysis of Crash Severity and Contributing Factors

Sunday, June 16, 2024

1:15 PM - 2:30 PM ET

Room: Galleria

Primary Author(s)

AM

Amal Mamlouk, n/a

Graduate Student
California State University, Sacramento
Sacramento, California, United States

Co-Author(s)

AT

Ashkan Teymouri, n/a

Research Scholar
University of California, Davis
Sacramento, California, United States

Primary Author(s)

Masoud Ghodrat Abadi, PhD

Assistant Professor
California State University, Sacramento
Sacramento, CA, United States

Presenter(s)

Masoud Ghodrat Abadi, PhD

Assistant Professor
California State University, Sacramento
Sacramento, CA, United States

Submitter(s)

MG

Masoud Ghodrat Abadi

California State University, Sacramento
Sacramento, California, United States

Abstract: This study delves into the causes of motorcycle crashes in California by analyzing data from the California Statewide Integrated Traffic Records System (SWITRS), comprising 111,282 motorcycle crashes between 2012 and 2022. Analysis of main violations reported for motorcycle crashes indicated the need to focus on deterring riding under the influence, managing speed, promoting safe turning and lane-changing practices, and addressing traffic signal compliance and improper passing. The study also explored the relationship between collision types and crash severity, emphasizing the significance of addressing issues related to broadside and head-on collisions in fatal crashes, overturning incidents in injury-related crashes, and sideswipe and rear-end collisions in property damage only. Utilizing an ordered logit model with random coefficient decomposition, the research identified statistically significant variables affecting crash severity. High-severity outcomes were associated with crashes occurring on highways, non-compliance with laws, collisions with other motor vehicles, and wet road surfaces. Age and gender further influenced the severity of crashes. Findings can collectively contribute to reducing the frequency and severity of motorcycle crashes, making the roads safer for motorcyclists and other road users alike.

Learning Objectives:

Attendees can expect to learn the following from this session:

Identify contributing factors of motorcycle crashes.
Perform safety evaluation of motorcycle crashes.
Describe determinants of severity of motorcycle crashes.