Effects of Driver Familiarity and Prolonged or Intermittent Right-Side Failure on Level Crossing Safety

Wullems, Christian; Haworth, Narelle; Larue, Gregoire; Haines, Andrew; Gildersleeve, Matthew · 2022 · Crossref

DOI: 10.54941/ahfe100748

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Summary

This study investigates the impact of driver familiarity and warning device reliability on safety at railway level crossings, specifically focusing on low-cost warning devices prone to right-side failures. The research addresses a critical safety issue in Australia, where many collisions occur at passive crossings used frequently by local residents who develop low expectations of encountering trains. The authors examine how prolonged or intermittent right-side failures—where warning signals activate without an approaching train—affect driver behavior, potentially leading to risk-taking due to diminished trust in the warning system. The researchers conducted a driving simulator experiment using a between-groups design with 23 participants assigned to control, intermittent failure, or prolonged failure conditions. Participants completed 13 trials of a monotonous rural driving task designed to induce familiarity. The control group experienced no failures, while the failure groups encountered five right-side failures before a train appeared on trial 10. Safety margins were calculated based on emergency braking distances relative to the crossing. Head movement data was also collected to assess visual scanning behavior, though technical limitations restricted this data to a subset of participants. Results provided mixed support for the familiarity hypothesis. Four participants collided with the train on its first appearance, indicating that the repetitive task successfully induced false environmental expectations. Contrary to expectations, safety margins decreased with repeated right-side failures only in the intermittent condition, not the prolonged condition. However, safety margins significantly increased from the first train encounter (trial 10) to the second (trial 12). Head movement data revealed that participants in the prolonged failure condition were more likely to check for trains during failure trials than in earlier no-signal trials, whereas control participants rarely checked when no signal was present. This suggests drivers in the prolonged failure group became more cautious, possibly recognizing the device's unreliability. The study concludes that driver expectations and safety behaviors are significantly influenced by the pattern of warning device failures. The findings highlight the importance of considering repetitive tasks and workload in experimental designs and accident investigations. The results imply that prolonged right-side failures may lead to increased caution and visual scanning, whereas intermittent failures might degrade safety margins. These insights are crucial for setting appropriate reliability targets for low-cost level crossing warning devices and understanding the human factors contributing to rail-road collisions.

Key finding

Safety margins decreased with repeated right-side failures only in the intermittent condition, while participants in the prolonged failure condition were more likely to check for trains visually.

Methodology

simulator

Sample size: 23

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Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

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• rail grade crossings
• driver vru interaction

Information type

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• Applied Guidance: countermeasure evaluation
• Empirical Findings: crash risk outcomes