Enhancing Pedestrian Experiences at Roundabouts [Technical Summary]

Gustafson, Joe; Godavarthy, Ranjit · 2022 · ROSA P / Minnesota. Department of Transportation. Local Road Research Board

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Summary

This study addresses the persistent concerns regarding pedestrian safety and experience at roundabouts in Minnesota. While roundabouts are known to improve vehicular traffic efficiency, reduce crashes, and lower costs compared to signalized intersections, public complaints often cite difficulties in navigating geometry and managing unpredictable driver behavior. These concerns typically arise during the planning and construction phases rather than after operations begin. The research aimed to understand these specific pedestrian issues, identify strategies to enhance the user experience, and develop practical guidance for local agencies designing new roundabouts or evaluating existing ones. To achieve these goals, researchers conducted a comprehensive review of past studies and cost-effective crossing treatments, including rectangular rapid flashing beacons (RRFBs). An online survey of traffic engineers and agency officials identified 15 locations with known or perceived issues. From these, eight roundabouts were selected for detailed case studies based on video footage quality and geographic distribution. The sites varied in configuration, including single- and multi-lane approaches, three- and four-leg designs, and different land uses such as business, residential, and school zones. Video cameras were installed at each leg for two days to observe pedestrian crossings. Investigators analyzed driver yielding rates, pedestrian behaviors (such as button activation for RRFBs, hesitation, or running), and the influence of variables like approach speeds and crossing treatments. The findings revealed that driver yielding behavior is significantly influenced by roundabout geometry and crossing treatments. Roundabouts with single-lane approaches exhibited the highest yielding rates, likely due to their simplicity and reduced driver distractions. Conversely, drivers exiting roundabouts yielded less frequently than those entering. Crucially, vehicle speeds played a major role, with lower speeds correlating to higher yielding rates. The study found that RRFBs were highly effective; drivers yielded almost 100% of the time when pedestrians activated the beacons, though yielding rates dropped significantly when the beacons were not activated. Based on these results, the researchers produced a guidance document for local agencies. Recommendations include designing sidewalks and splitter islands wide enough to accommodate pedestrians, bicyclists, and wheelchair users, and using landscape strips to discourage jaywalking. For complex roundabouts or those with high traffic volumes, signalized crossings are recommended, while RRFBs are suggested as a cost-effective alternative to full signals. The study concludes that while Minnesota’s roundabouts maintain excellent safety records, applying this guidance can further enhance pedestrian confidence and experience. Future research directions include analyzing the correlation between yielding and crash rates and investigating the experiences of visually impaired pedestrians.

Key finding

Drivers yielded to pedestrians almost 100% of the time when RRFBs were activated, and single-lane roundabout approaches demonstrated higher yielding rates than multi-lane approaches or exiting vehicles.

Methodology

field_study

Sample size: 8

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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• intersection design