Field Test of On-Site Drug Detection Devices
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Summary
This study, sponsored by the National Highway Traffic Safety Administration (NHTSA), addresses the need to evaluate the utility and accuracy of on-site drug detection devices when used by law enforcement officers. While previous research established the prevalence of drug-impaired driving, existing evaluations of on-site screening devices were conducted in laboratory settings by trained professionals. This field test aimed to determine how effectively five commercially available immunoassay devices perform in real-world conditions when administered by police officers to drivers suspected of driving under the influence (DUI). The study sought to assess device accuracy against Gas Chromatography/Mass Spectrometry (GC/MS) confirmation, evaluate feasibility for roadside use, and gather officer feedback on device usability. The research was conducted in two major U.S. jurisdictions: Nassau County, New York, and Houston, Texas. Between 1998 and 1999, urine specimens were collected from 800 drivers arrested for suspected DUI. Five specific on-site devices were selected for testing: AccuSign®, OnTrak TesTcup-5®, OnTrak TesTstik®, Rapid Drug Screen®, and Triage®. Each device was designed to detect five major classes of drugs: amphetamines, cocaine metabolites, opiates, marijuana metabolites, and phencyclidine (PCP). Police officers administered the tests according to manufacturer protocols, and all specimens were subsequently sent to the University of Utah’s Center for Human Toxicology for laboratory confirmation via GC/MS. Additionally, officers provided subjective ratings on five dimensions: ease of handling, time to conduct the test, specimen handling, reagent mixing, and readability of results. The study findings focused on the number of drug positives detected by each device, discrepancies among the five devices, and differences between on-site results and laboratory confirmations. The text indicates that the actual drug-positive rate among arrestees was higher than the anticipated 10–15%, providing a robust sample for evaluation. The results highlighted specific issues such as false positives and false negatives, as well as unconfirmed positives based on analytical cutoffs and tested drugs. The study also compared the results obtained by police officers with those obtained by research analysts to assess the impact of user expertise. Officer ratings provided data on the practical feasibility of integrating these devices into police operations, with specific attention to the complexity and reliability of each device’s procedure. The significance of this research lies in its role as the first comprehensive field evaluation of on-site drug screening devices used directly by law enforcement. By comparing field results to the gold-standard GC/MS confirmation, the study provides critical evidence regarding the reliability of these devices for corroborating field sobriety assessments and supporting legal proceedings. The findings inform NHTSA’s efforts to improve highway safety by determining whether on-site testing can be effectively integrated into DUI enforcement protocols. The study underscores the importance of evaluating diagnostic tools in their intended operational environment rather than controlled laboratory settings, offering insights into the practical challenges and accuracies associated with roadside drug detection.
Key finding
The five on-site drug screening devices demonstrated variable accuracy in detecting specific drug classes among 800 DUI arrestees, with significant discrepancies observed between device results and mass spectrometry confirmations for certain substances.
Methodology
field_study
Sample size: 800
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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- Methodological Resource: validation psychometrics