Accelerating Roundabout Implementation in the United States - Volume VI of VII: Investigation of Crosswalk Design and Driver Behaviors

Findley, Daniel; Searcy, Sarah; Salamati, Katy; Schroeder, Bastian J.; Williams, Brian; Bhagavathula, Rajaram; Rodegerdts, Lee A. · 2015 · ROSA P / United States. Department of Transportation. Federal Highway Administration. Office of Safety

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Summary

This report, Volume VI of the Federal Highway Administration’s “Accelerating Roundabout Implementation in the United States” series, investigates pedestrian crosswalk design and driver yielding behaviors at modern roundabouts. Motivated by the need to enhance pedestrian safety and accessibility as roundabout adoption increased, the study addresses critical design questions regarding crosswalk location, orientation, and distance from the circulatory roadway. Specifically, it seeks to determine whether crosswalks should be placed closer to the roundabout for lower vehicle speeds or farther away to improve driver sight lines and reaction times. The research employed two primary methodologies: a naturalistic yielding study and an eye-tracking study. The yielding study utilized staged pedestrian crossings at single-lane and two-lane roundabouts in Carmel, Indiana, and Hilliard, Ohio. These locations were selected to control for regional variations in driver and pedestrian culture, allowing for the isolation of geometric factors. Researchers recorded driver yielding rates across various crosswalk configurations, including entry versus exit locations and distances from the circulatory roadway. The eye-tracking study involved participants driving through roundabouts while wearing eye-tracking devices to record gaze patterns, dwell times, and fixation durations on pedestrians, signs, and navigation aids. Key findings indicate that drivers yield more frequently at roundabout entry crosswalks than at exit crosswalks, a behavior attributed to deceleration at entries versus acceleration at exits. Drivers were also more likely to yield to pedestrians waiting at splitter islands than those at the curb. Statistical modeling revealed that while crosswalk distance from the circulatory roadway affected yielding percentages, the effect was not practically significant. Eye-tracking data showed that drivers spent considerable time glancing at pedestrians and related signage, which reduced the time spent observing navigation aids. Previous literature cited in the report suggests that moving exit crosswalks farther from the circulating lane (e.g., from 20 ft to 60 ft) can significantly increase yielding rates by improving visibility. The study concludes that crosswalk geometry and location significantly influence driver yielding behavior, with entry crosswalks generally offering higher safety performance due to lower speeds and better visibility. The findings provide empirical evidence to inform design guidelines for roundabout crosswalks, emphasizing the importance of optimizing crosswalk placement to maximize pedestrian visibility and driver awareness. By controlling for regional behavioral biases, the research offers robust data for practitioners aiming to implement safer, more effective roundabout designs in the United States.

Key finding

Drivers yielded more frequently at roundabout entry crosswalks than at exit crosswalks and were more likely to yield to pedestrians waiting on splitter islands than at the curb, while crosswalk distance from the circulatory roadway had a statistically significant but practically negligible effect on yielding rates.

Methodology

mixed_methods

Provenance

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

Topics

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• driver vru interaction
• pedestrian behavior perception
• rail grade crossings
• intersection design

Information type

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• Empirical Findings: behavioral performance data