Identification of Traffic Control Devices for Mobile and Short Duration Work Operations

Paswell, Robert E.; Baker, Robert F.; Kamga, Camille; Rouphail, Nagui M. · 2006 · ROSA P / University Transportation Research Center

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Summary

This report addresses the safety challenges associated with mobile and short-duration work zones, defined as maintenance operations that move intermittently or continuously along the pavement or shoulder. The research was motivated by the increasing frequency of highway maintenance due to aging infrastructure, which contributes significantly to traffic congestion and crash risks. The primary objective was to identify state-of-the-art traffic control devices, information systems, and enforcement strategies to reduce delays, improve worker protection, and mitigate crashes caused by motorist inattention and speeding. The study was conducted by the Region II University Transportation Research Center and the Institute for Transportation Research and Education through three main tasks: a comprehensive literature search, the development of evaluation criteria, and the identification of guidelines to eliminate driver inattentiveness. Researchers reviewed sources including Transportation Research Board (TRB) and National Cooperative Highway Research Program (NCHRP) reports, Strategic Highway Research Program (SHRP) findings, and state Department of Transportation (DOT) practices. The team also conducted five field observations of mobile operations in New Jersey, such as pothole patching and shoulder sweeping, to compare current practices against Manual on Uniform Traffic Control Devices (MUTCD) standards. Additionally, researchers visited the California Department of Transportation (Caltrans) to observe the implementation of the Balsi Beam, a protective barrier device. Key findings identified several technologies with potential to enhance safety. The Balsi Beam was highlighted as the most promising device for protecting exposed workers, offering crash-worthy protection that can be deployed in under ten minutes without requiring a clear zone between the barrier and workers. Other effective devices included orange rumble strips, radar-triggered speed displays, and the CB Wizard alert system, which were shown to reduce speed variance and improve merging behavior. The study also noted that no single warning light type is maximally effective; thus, combining rotating/strobe lights for attention with flashing lights for information transmission is recommended. Analysis of crash data indicated that motorist inattention, careless driving, and speeding were the primary causes of work zone accidents. The report concludes that while current New Jersey DOT practices generally meet MUTCD standards, there is a need for improved devices to capture driver attention and protect workers. The authors recommend that the New Jersey DOT fabricate and implement the Balsi Beam with assistance from Caltrans and the Federal Highway Administration. Furthermore, they advise implementing "Bright Zone Signs" and beacon-wear safety vests to improve visibility. The study emphasizes that any new safety devices should be deployed alongside worker safety training and public education programs to maximize effectiveness.

Key finding

The Balsi Beam provides crash-worthy protection for workers in short-duration operations with a setup time of less than 10 minutes and no required clear zone, while motorist inattention remains the most significant cause of work zone crashes.

Methodology

review

Provenance

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

Topics

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• emergency work zone conspicuity
• work zones
• perceptual countermeasures