Effectiveness of LED-Enhanced Signs in Reducing Incidents of Vehicles Stopping on Tracks

Baron, William R.; daSilva, Marco P. · 2019 · ROSA P / United States. Department of Transportation. Federal Railroad Administration

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Summary

This study, conducted by the Volpe National Transportation Systems Center for the Federal Railroad Administration, evaluated the effectiveness of LED-enhanced R8-8 signs in reducing incidents of vehicles stopping on railroad tracks. The research was motivated by the high frequency of highway-rail grade crossing incidents, many of which involve vehicles stopping on tracks due to traffic congestion. The study focused on the Brighton Street crossing in Belmont, Massachusetts, a site with a history of safety issues, including serious injuries and fatalities related to vehicles blocking the tracks. The experimental design involved a before-and-after analysis at a single active grade crossing. Researchers collected video data during peak traffic hours (6:00 a.m. to 10:00 a.m. and 3:00 p.m. to 7:00 p.m.) for 40 hours prior to the installation of LED-enhanced signs and 40 hours after. The signs, which read “DO NOT STOP ON TRACKS” and featured flashing white LEDs, were installed on April 1, 2019. Two different manufacturers’ signs were tested to compare brightness and durability. Driver behavior was coded based on five defined zones, ranging from Zone 1 (safe stop before the stop line) to Zone 3 (dangerous stop directly on the tracks). The analysis focused on vehicles that came to a complete stop, excluding those passing through or stopping for regulatory compliance. The results indicated a significant improvement in driver behavior following the installation of the LED signs. Overall, the frequency of vehicles stopping on the tracks (Zone 3) decreased by 41.2 percent. Specifically, for southbound traffic, there was a 41.5 percent reduction in vehicles stopping in Zone 3 and a 33.3 percent increase in vehicles stopping safely in Zone 1. A chi-square test confirmed that the difference between pre- and post-installation conditions was statistically significant (p < 0.01). While northbound traffic showed more violations overall, largely due to drivers stopping to yield to pedestrians and bicyclists, the LED signs still reduced the proportion of vehicles stopping directly on the tracks from approximately 30 percent to just over 20 percent. The study concludes that LED-enhanced regulatory signage is an effective countermeasure for reducing the incidence of vehicles stopping on tracks at grade crossings. The enhanced visibility of the signs appeared to influence drivers to stop before entering the crossing when traffic was backed up. However, the authors note that the findings are limited to a single crossing and recommend additional field testing before broader implementation recommendations can be made. The study also highlighted differences in the physical durability and brightness of signs from different manufacturers, noting that one brand provided significantly better visibility in bright sunlight.

Key finding

LED-enhanced signs reduced the frequency of vehicles stopping on the tracks by 41 percent.

Methodology

field_study

Sample size: 2610

Provenance

The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_rosap on 2026-05-23 (6 acquisition events logged).

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.

• rail grade crossings
• signage environment
• emergency work zone conspicuity
• vru facing ehmi
• roadway lighting effects