Active Work Zone Safety Using Emerging Technologies

Marks, Eric; Vereen, Stephanie C.; Awolusi, Ibukun · 2016 · ROSA P / University Transportation Centers Program (U.S.)

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Summary

This study addresses the critical safety risks associated with highway construction work zones, where workers operate in close proximity to moving traffic. The research was motivated by high rates of work-zone-related fatalities and injuries, often caused by drivers disregarding standard traffic control devices or failing to notice errant vehicles in chaotic environments. The primary objective was to conduct a conceptual analysis and experimental evaluation of emerging intrusion sensing technologies to determine their effectiveness in alerting workers and drivers during hazardous intrusions. The methodology comprised two phases: a comprehensive literature review and field experimentation. The review identified five categories of intrusion technologies: kinematic, infrared-based, pneumatic/microwave, radar-based, and radio-based systems. Based on commercial availability and applicability, three systems were selected for testing: the SonoBlaster (kinematic/impact-activated), the Traffic Guard Worker Alert System (pneumatic), and the Intellicone (radio-based). Experimental trials were conducted at a simulated work zone on an abandoned roadway in Selma, Alabama. Researchers established a 300-meter test bed with lane closures and used a vehicle traveling at 40 km/h (25 mph) and 72 km/h (45 mph) to trigger the alarms via impact or hose crossing. Data collection involved measuring sound levels, worker reaction times, vehicle stopping times, and stopping distances across multiple trials with workers positioned at varying distances from the alarm source. The findings indicate that while the number of applicable intrusion technologies is limited, the commercially available systems evaluated possess the capability to effectively alert personnel during hazardous situations. The experimental results provided scientific validation of the limitations and performance characteristics of these devices. Specifically, the study measured the auditory alert levels and the subsequent reaction times of workers and drivers, demonstrating that these technologies can provide critical warning intervals. The research also highlighted previous limitations of similar systems, such as false alarms and setup difficulties, which informed the selection and evaluation criteria for the current study. The significance of this research lies in its provision of an objective assessment and implementation guide for work zone intrusion detection devices. The study concludes that active intrusion sensing technologies can mitigate unforeseen conditions in work zones where physical barriers are not feasible. Based on the experimental findings, the authors provide specific recommendations for the adoption of these technologies by the Alabama Department of Transportation (ALDOT). The report serves as a technical resource for improving safety performance by integrating real-time monitoring and alert systems into highway maintenance and construction operations.

Key finding

Selected commercially available intrusion sensing technologies effectively provided alerts to highway work zone personnel when a hazardous situation was present.

Methodology

field_study

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