Analysis of Crashes Involving Micromobility Devices

Abstract

Shared micromobility systems have become increasingly popular for short-distance travel. Different cities have been adopting micromobility systems to mitigate several transportation-related problems. Micromobility devices include e-scooters and e-bikes. However, the safety impacts of these devices have not been extensively studied. This study investigates the safety implications of various on-street facilities for micromobility users. It estimates crash modification factors for micromobility crashes in Florida for roadway segments and signalized intersections. This research utilizes a negative binomial Lindley model to analyze crash data involving micromobility users from 2021 to 2023, identifying significant factors contributing to micromobility crashes. For roadway segments, the presence of on-street parking and sharrow lanes were found to increase the likelihood of micromobility crashes. In contrast, the presence of sidewalk barriers was associated with a reduction in such crashes. At signalized intersections, the presence of multiple approaches with exclusive left-turn lanes, exclusive right-turn lanes, and permitted left-turn signals were associated with an increased probability of micromobility crashes. Conversely, intersections with multiple approaches featuring protected-permitted left-turn signals were associated with a reduction in micromobility crashes. The findings of this study provide valuable insights for transportation agencies planning to incorporate micromobility systems in their jurisdictions, helping to improve the overall safety of these systems.