Use of Traffic Channelization Devices at Highway-Rail Grade Crossings

Horton, Suzanne M. · 2012 · ROSA P / United States. Federal Railroad Administration. Office of Research and Development

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Summary

This report, sponsored by the Federal Railroad Administration (FRA), evaluates the use of traffic channelization devices, such as median barriers and raised curbs, as safety measures at highway-rail grade crossings. The research addresses the persistent challenge of grade crossing collisions, noting that while incidents have decreased since 1994, fatalities remain significant. The primary motivation is to deter unsafe driver behaviors, specifically motorists circumventing lowered gate arms, which is strongly correlated with collisions. The report highlights that these devices are particularly relevant for establishing "quiet zones," where locomotive horns are silenced, requiring supplemental safety measures (SSMs) to mitigate risk. The study reviews various channelization options, including wide raised medians, barrier wall systems, non-mountable curb islands, and mountable raised curb systems with vertical panels. It emphasizes that mountable curbs are the most cost-effective option, costing approximately $14,000 compared to $100,000–$250,000 for wayside horns or four-quadrant gates. The report synthesizes findings from multiple field studies conducted by entities such as the North Carolina Department of Transportation, the Massachusetts Bay Transportation Authority, and the University of Nebraska. These studies measured changes in driver behavior before and after installation, using metrics such as gate rushing, entering crossings during gate descent, and circumventing gates. The findings demonstrate that traffic channelization devices significantly reduce unsafe driver behavior. Specific studies reported reductions in violations ranging from 31.5% to 96%. For instance, an installation in Chelsea, MA, resulted in an 87% reduction in unsafe vehicular events, while a site in North Carolina saw a 77% decrease in violations. Aggregating data from various studies, the report concludes that these installations reduce unsafe driver behaviors by an average of 68%. This empirical evidence aligns with the FRA’s Final Rule on Locomotive Horns, which assigns traffic channelization devices an effectiveness rating of 0.75, indicating a 75% reduction in the likelihood of a collision. The significance of these findings lies in providing a low-cost, high-effectiveness strategy for improving grade crossing safety. The report concludes that median barriers are an approved and effective SSM for quiet zones, provided they meet specific design criteria, such as extending 100 feet from the gate arm. However, the authors note limitations, including the need for engineering judgment to accommodate emergency vehicles and large agricultural equipment, and the observation that these devices do not improve pedestrian safety. The report encourages traffic engineers to utilize these devices as part of a comprehensive safety strategy, supported by available federal and state funding mechanisms.

Key finding

The installation of traffic channelization devices at highway-rail grade crossings reduces unsafe driver behaviors by an average of 68 percent.

Methodology

review

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

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• rail grade crossings
• perceptual countermeasures