Examining Driver Behavior in Response to Work Zone Interventions: A Driving Simulator Study

Reyes, Michelle L.; Khan, Sameer A. · 2010 · ROSA P / University of Iowa

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Summary

This study addresses the safety risks associated with construction zones, which cause significant fatalities and injuries annually. The primary objective was to demonstrate the feasibility of using driving simulators to evaluate the impact of specific work zone interventions on driver performance before real-world implementation. The research focused on three key variables: work zone barrier type (concrete barriers, drums, or 42-inch channelizers), the presence or absence of a 4-foot lateral buffer, and work zone activity levels (high or low). The study employed a mixed experimental design using the National Advanced Driving Simulator (NADS) MiniSim. Twenty-four participants, evenly divided by gender and age group (middle-aged: 35–50 years; senior: 65–80 years), completed six 12-minute drives. The design included within-subjects factors for barrier type and lateral buffer presence, and a within-subjects factor for work zone activity transitions (low-to-high, high-to-low, or low-only). Data collected included average speed, speed variability, average lane position, and lane position variability. The results indicated that participants drove fastest with the least speed variability in work zones featuring concrete barriers. In contrast, drums and channelizers affected performance differently depending on specific conditions. Regarding lateral buffers, the 4-foot buffer reduced speed variability in some conditions, but average speeds were more consistent across groups when the buffer was absent, particularly in drum and channelizer scenarios. High work zone activity levels resulted in slower average speeds and increased speed variability compared to low activity areas. The authors noted that lengthy longitudinal buffers or intermittent work activity could increase crash risk by creating opportunities for large speed differentials among drivers. The study concludes that driving simulators are a viable, cost-effective tool for investigating work zone interventions and individual driver performance. While the findings align with some in situ studies, the authors caution that generalizability to actual road design is limited by the need for further simulator validation. The research highlights specific gaps in current knowledge, particularly regarding the effects of barrier types and lateral buffers, suggesting that future studies should combine simulator data with on-road evaluations to fully assess safety implications.

Key finding

Drivers exhibited the fastest speeds and lowest speed variability in work zones with concrete barriers, whereas high work zone activity levels resulted in slower average speeds and increased speed variability compared to low activity areas.

Methodology

simulator

Sample size: 24

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_with_issues.

Topics

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

• work zones
• perceptual countermeasures
• emergency work zone conspicuity
• rail grade crossings
• speed choice
• traffic density

Information type

What kind of knowledge this paper contributes, grouped by family — independent of topic (what it is about) and method (how it was studied).

• Empirical Findings: behavioral performance data
• Methodological Resource: tool software, validation psychometrics