An Assessment of Behavioral Tests to Detect Impaired Drivers
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Summary
This 1981 report by the Decision Science Consortium, commissioned by the National Highway Traffic Safety Administration (NHTSA), assesses the feasibility and practicality of roadside behavioral tests for detecting driver impairment. The study was motivated by legislative mandates under the Surface Transportation Act of 1978 to address drug-impaired driving, a problem less defined than alcohol impairment due to the difficulty of chemically detecting non-alcohol drugs and the lack of established behavioral syndromes for various substances. The authors argue that behavioral tests should be viewed as complementary to, rather than competitive with, chemical tests, as both approaches have inherent limitations in measuring the complex construct of "Driver Skill and Safety." The methodology involved a comprehensive review of existing literature to identify potential behavioral tests and evaluate their validity. The authors developed a framework for evaluating these tests based on five criteria: validity, reliability, ease of operational use, safety, and diagnosticity. They addressed the "criterion problem," arguing that defining validity strictly as the prediction of traffic accidents is flawed because accidents are inherently unpredictable and have low autocorrelation. Instead, they posited that behavioral tests should be validated based on their ability to measure specific behavioral skills involved in driving. The researchers identified 54 potential tests and scored each against the established criteria. These scores were weighted according to the relative importance of each criterion from the perspectives of both researchers and law enforcement users to produce an overall feasibility index for each test. The results identified several tests as highly feasible for roadside use, specifically visual acuity, finger-to-finger, finger-to-nose, and the Romberg (and modified Romberg) tests. The report also included a legal analysis concluding that behavioral tests possess useful status as circumstantial evidence in court and can likely be administered without the need for expert witnesses. The authors emphasized that while no single test can perfectly predict accident risk or capture all aspects of driving skill, a battery of behavioral tests can effectively measure the level of impairment in specific driving-related skills. The significance of this work lies in its justification for the continued development and deployment of behavioral testing protocols. By shifting the definition of validity from accident prediction to the measurement of driving skills, the report provides a theoretical and practical foundation for using behavioral tests alongside chemical analyses. It concludes that behavioral tests offer a justifiable method for detecting impairment, particularly for drugs other than alcohol, and addresses practical concerns regarding their legal admissibility and operational use by law enforcement.
Key finding
Visual acuity, finger-to-finger, finger-to-nose, and Romberg tests were identified as the most feasible behavioral measures for detecting driving impairment.
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).
| 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.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.
- fitness to drive assessment
- dbq psychometrics
- dui enforcement
- drowsy as impairment
- workload measurement
- simulator validity fidelity
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).
- Methodological Resource: validation psychometrics, measurement protocol
- Theoretical Contribution: computational model