Influence of Pedestrian Collision Warning Systems on Driver Behavior—A Driving Simulator Study
DOI: 10.1061/9780784484876.027
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Summary
This study investigates the impact of Pedestrian Collision Warning (PCW) systems on driver braking behavior, addressing the critical need to evaluate how Connected and Automated Vehicle (CAV) technology influences driver reactions to vulnerable road users. Motivated by rising pedestrian fatalities and the limitations of traditional sensor-based warning systems, the research focuses on Vehicle-to-Pedestrian (V2P) technology, which alerts drivers to pedestrians even when visibility is obstructed. The authors identified a gap in existing literature regarding driver braking behavior in response to P2V warnings within a simulator environment, prompting this first-of-its-kind evaluation. The researchers conducted a driving simulator study at Morgan State University using a medium-fidelity simulator and Tobii Pro eye-tracking devices. A virtual network of downtown Baltimore was created to ensure realism for the 93 recruited participants. Two scenarios were tested: a baseline without warnings and a scenario with a PCW system triggered when a jaywalking pedestrian appeared 40 meters ahead. Data collected included speed, acceleration, braking intensity, and gaze patterns. The study utilized a Log-logistic Accelerated Failure Time (AFT) model to analyze speed reduction times—the duration from pedestrian visibility to reaching minimum speed—and performed longitudinal jerk analysis to assess braking smoothness. Results indicated that the PCW system significantly altered driver behavior. Participants with the PCW system exhibited longer speed reduction times (mean 3.14 seconds) compared to the baseline (2.53 seconds), allowing more time to safely yield. While the PCW group achieved a lower average deceleration rate (2.99 m/s² vs. 3.19 m/s²), they reacted faster, with a perception reaction time of 0.29 seconds versus 0.36 seconds in the baseline. Jerk analysis revealed that PCW users experienced unsafe initial jerk values due to aggressive early braking, whereas baseline users experienced highly uncomfortable positive jerk values from sudden throttle application after late braking. Eye-tracking data confirmed that the PCW alert successfully captured driver attention, and male participants demonstrated significantly longer speed reduction times than females. The study concludes that PCW systems effectively enhance pedestrian safety by providing drivers with earlier warnings, enabling them to adapt their speed and yield safely. Although the system induces initial aggressive braking, it prevents the dangerous late-reaction maneuvers observed in the baseline scenario. The findings suggest that PCW technology is a valuable tool for improving driver response to jaywalking pedestrians, particularly for those who might otherwise fail to yield. The high participant preference for this technology further supports its potential integration into future vehicle safety systems.
Key finding
The presence of a pedestrian collision warning system significantly increased driver speed reduction times and reduced deceleration rates, resulting in safer yielding maneuvers despite initially aggressive braking.
Methodology
simulator
Sample size: 93
Provenance
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | Crossref | — | — | 1 | 2026-06-05 |
| archive | success | canonical_url | — | — | 1 | 2026-06-06 |
| extract | success | cached | — | — | 3 | 2026-06-10 |
| clean | success | clean | — | — | 1 | 2026-06-07 |
| chunk | success | chunk | — | — | 1 | 2026-06-07 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-07 |
| enrich | success | semantic_scholar | — | — | 1 | 2026-06-06 |
| promote | success | — | — | — | 1 | 2026-06-05 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 2 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 15 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.
- pedestrian behavior perception
- braking response
- perception reaction time
- rail grade crossings
- behavioral adaptation risk compensation
- driver vru interaction
Information type
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- Empirical Findings: behavioral performance data
- Methodological Resource: tool software
- Theoretical Contribution: computational model