Countermeasures That Work – Older Drivers [Traffic Tech]

NHTSA · 2021 · ROSA P / United States. National Highway Traffic Safety Administration. Office of Behavioral Safety Research

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 document, published by the National Highway Traffic Safety Administration (NHTSA) in 2021, addresses the growing safety challenges associated with the aging driver population in the United States. The research is motivated by demographic shifts: the population aged 65 and older increased from 12% in 1982 to 16% in 2018, with projections reaching 21% by 2030. Consequently, the number of licensed older drivers rose to 45.2 million, comprising 20% of all licensed drivers. While age does not inherently determine driving safety, physiological changes increase older adults' fragility and susceptibility to severe injury. In 2018, older drivers accounted for 14% of drivers in fatal crashes. Common errors include failure to yield, inadequate surveillance, and misjudgment of gaps, leading to higher rates of angle, overtaking, and intersection collisions. Although older drivers travel fewer miles, their fatal crash rate per mile traveled is higher than all age groups except teenagers, primarily due to increased physical frailty. The paper evaluates four behavioral countermeasures identified in the 10th edition of *Countermeasures That Work* as effective or promising for improving older driver safety. The first two countermeasures, license screening/testing and referring older drivers to licensing agencies, are rated as effective. Screening processes vary by state, but licensing decisions should be based on functional performance rather than age. Referrals, primarily from law enforcement, medical professionals, and family (accounting for 85% of cases), are critical for identifying at-risk drivers. Evidence from Missouri and Oregon demonstrates that effective referral procedures, particularly those involving physician reporting, can reduce crashes among reported drivers. The third countermeasure, license restrictions, is also rated as effective. When drivers pose risks only in specific situations, agencies can impose restrictions such as daylight-only driving or limiting travel to low-speed roadways. Studies indicate that these restrictions lower crash risk for older drivers, though their risk remains higher than that of unrestricted peers. The fourth countermeasure, law enforcement roles, is rated as promising. Officers contribute to safety by enforcing seat belt laws, recognizing signs of impairment during traffic stops, and referring drivers to licensing agencies. Training resources are available to help officers effectively interact with and evaluate older drivers. The significance of these findings lies in the identification of underutilized safety strategies. NHTSA research indicates that less than 0.4% of older licensed drivers are referred annually, and license restrictions are rarely implemented despite their proven effectiveness. The paper concludes that states are missing opportunities to improve safety by not broadly adopting referrals and restrictions. Implementing these low-cost, evidence-based countermeasures can help balance the mobility needs of older adults with the safety of all road users, potentially reducing fatal crashes and severe injuries among this vulnerable demographic.

Key finding

The most effective programs for older driver safety aim to identify risky drivers and either limit their driving to contexts that meet their abilities or move them to other transportation methods.

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.

• older driver retraining
• older drivers
• licensing policy
• driver education effectiveness
• novice drivers

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).

• Applied Guidance: policy recommendations
• Empirical Findings: observational prevalence, crash risk outcomes