The Effects of High Visibility Enforcement on Driver Compliance to Pedestrian Stop Right-of-Way Laws in Ann Arbor, MI
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Summary
This study evaluated the effectiveness of a multifaceted high-visibility enforcement (HVE) program on driver compliance with pedestrian right-of-way laws in Ann Arbor, Michigan. The research aimed to replicate findings from a previous study in Gainesville, Florida, which demonstrated that combining police enforcement with community feedback could significantly increase yielding behavior and sustain those changes over time. The primary objectives were to determine if this intervention could produce a large, sustained change in driving culture in a northern city adjacent to a larger metropolitan area and to assess whether improvements generalized to untreated locations. The experimental design involved 12 uncontrolled crosswalk sites selected based on pedestrian trip generators and safety criteria for enforcement operations. Six sites were designated as treatment sites receiving HVE, while six served as untreated generalization sites. The intervention consisted of five two-week enforcement waves conducted between June 2017 and June 2018. The program utilized plainclothes police officers as decoy pedestrians, issuing warnings during the initial wave and citations in subsequent waves, totaling 2,502 traffic stops. Countermeasures included educational outreach via school flyers, paid media campaigns, and engineering upgrades such as in-street warning signs. A critical component was the installation of eight feedback signs displaying the weekly percentage of drivers yielding to pedestrians and the record high. Data collection involved trained observers recording stopping behavior for both staged (decoy) and naturalistic crossings, using a defined "dilemma zone" to ensure drivers had sufficient distance to stop safely. The results indicated substantial improvements in driver compliance. At the six treatment sites, the mean percentage of motorists stopping for pedestrians increased from 28.5% to 65.2%. At the six generalization sites, which received no direct enforcement, compliance rose from 34.2% to 53.0%. These gains mirrored the magnitude of improvements observed in the Gainesville study. The authors identified the feedback signs, which provided weekly compliance data and social norming cues, as a key element contributing to the program's success. The study also noted that yielding behavior was higher for naturalistic crossings than for staged ones, potentially due to more assertive crossing behaviors by natural pedestrians. The findings suggest that a combined strategy of high-visibility enforcement, public education, and community feedback can effectively alter driver behavior and promote a culture of yielding to pedestrians. The significant increase in compliance at untreated generalization sites indicates that the effects of the program spread beyond the specific enforcement locations. The authors conclude that such multifaceted interventions are viable for improving pedestrian safety in cities similar to Ann Arbor and recommend collecting follow-up data to determine the long-term persistence of these behavioral changes.
Key finding
Driver yielding to pedestrians increased from 28.5% to 65.2% at enforcement sites and from 34.2% to 53% at untreated generalization sites following the implementation of high-visibility enforcement and feedback signs.
Methodology
field_study
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).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | rosap | — | — | 2 | 2026-05-23 |
| archive | success | — | — | — | 1 | 2026-05-23 |
| extract | success | cached | — | — | 2 | 2026-06-10 |
| clean | success | — | — | — | 1 | 2026-06-01 |
| chunk | success | — | — | — | 1 | 2026-06-01 |
| embed | success | — | — | — | 1 | 2026-06-02 |
| enrich | success | — | — | — | 1 | 2026-05-23 |
| promote | success | — | — | — | 1 | 2026-05-23 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 3 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 19 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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- Applied Guidance: countermeasure evaluation