General guidelines for active traffic management deployment : interim report.

Levecq, Charles; Kuhn, Beverly; Jasek, Debbie · 2011 · ROSA P / Texas Transportation Institute. University Transportation Center for Mobility

archive: archived pipeline: cataloged verified

Get this paper ↗ (full text — opens at the source; we link to it, we don't host it)

Summary

This interim report, produced by the Texas Transportation Institute for the University Transportation Center for Mobility, addresses the challenge of managing congestion on freeway corridors where public funding for physical expansion is limited. The study focuses on Active Traffic Management (ATM), a holistic approach widely deployed in Europe since the 1980s but still in its early stages in the United States. ATM aims to maximize the effectiveness, efficiency, and safety of existing infrastructure by dynamically managing traffic flow through integrated strategies. The primary motivation is to provide U.S. transportation agencies with general guidelines and best practices for deploying ATM strategies, thereby improving trip reliability, throughput, and safety without requiring significant geometric changes to roadways. The research methodology involves a comprehensive review of international and domestic ATM experiences, drawing from a 2006 Federal Highway Administration International Scan Tour of Europe and subsequent literature reviews. The report analyzes specific ATM strategies, including temporary shoulder use (for all vehicles or transit-only), speed harmonization, queue warning, dynamic merge control, dynamic rerouting, and dynamic truck restrictions. The authors examine case studies from England, Germany, the Netherlands, and various U.S. states to identify essential elements, data needs, key factors, and potential impacts for each strategy. This assessment allows for the development of high-level guidelines intended for state Departments of Transportation, metropolitan planning organizations, and other relevant agencies. Key findings highlight the efficacy of specific ATM measures. Temporary shoulder use, such as Hard Shoulder Running (HSR), significantly increases capacity; for instance, the M42 pilot in England reduced travel times by up to 26% and improved reliability by 34%, while a German study on the A5 showed a 20% capacity increase. Speed harmonization, which automatically adjusts speed limits based on sensor data, helps manage congestion and weather-related conditions. Queue warning systems alert drivers to upstream queues, reducing erratic braking and collisions. The report notes that ATM strategies can increase average throughput, delay freeway breakdown, and reduce primary and secondary accidents. In the U.S., shoulder use has been primarily limited to transit vehicles, though some states have successfully implemented temporary shoulder use for all vehicles during peak periods. The study also identifies critical deployment criteria, such as minimum shoulder widths, pavement strength, and the necessity of active incident management and enforcement mechanisms. The significance of this report lies in its provision of actionable guidelines for U.S. agencies seeking to optimize existing infrastructure. By synthesizing European best practices with domestic experiences, the document offers a framework for assessing the suitability of ATM strategies for specific jurisdictions. It emphasizes that ATM can provide measurable benefits, including enhanced safety, reduced emissions through improved flow, and cost savings compared to traditional roadway widening. The report concludes that while ATM is promising, successful deployment requires careful consideration of data needs, stakeholder communication, and integration with other traffic management systems to ensure safety and operational efficiency.

Key finding

Active Traffic Management strategies, particularly temporary shoulder use and speed harmonization, effectively increase freeway capacity and improve safety by optimizing existing infrastructure without major construction.

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

Ranked by relevance to this paper. Hover a topic for its definition.

• speed management
• perceptual countermeasures
• work zones
• signage environment