Berning, A., & Smither, D.D. (2014). Understanding the Limitations of Drug Test Information, Reporting, and Testing Practices in Fatal Crashes. DOT HS 812 072. Washington, DC: NHTSA.
Bui, B., & Reed, J. (2019). Driving Under the Influence of Drugs and Alcohol: A Report Pursuant to House Bill 17-1315. Denver: Colorado Division of Criminal Justice, Department of Public Safety.
Compton, R., Vegega, M., & Smither, D. (2009). Drug-Impaired Driving: Understanding the Problem & Ways to Reduce It: A Report to Congress. Washington, D.C.: NHTSA.
Edwards, L., Smith, K., & Savage, T. (2017). Drugged driving in Wisconsin: Oral fluid versus blood. Journal of Analytical Toxicology, 41(6), 523-529
Government Accountability Office. (2015). Drug-Impaired Driving: Additional Support Needed for Public Awareness Initiatives. Washington, DC: Author.
Griffiths, P. (2014). An Overview of Drug Impaired Driving in the European Union. Presented at the 2nd International Symposium on Drugs and Driving. Wellington, NZ: New Zealand Drug Foundation.
Grondel, D., Hoff, S., & Doane, D. (2018). Marijuana Use, Alcohol Use, and Driving in Washington State: Emerging Issues with Poly-Drug Use on Washington Roadways. Olympia: Washington Traffic Safety Commission.
Harmon, J. (2019, July). Drug and Polydrug Use Among Drivers: A Toxicology Perspective. Presented as part of the Transportation Research Board (TRB) Alcohol and Other Drugs Committee mid-year meeting webinar, Washington, DC.
Hartman, R., Brown, T., Milavetz, G. et al. (2015). Controlled cannabis vaporizer administration: Blood and plasma cannabinoids with and without alcohol. Clinical Chemistry, 61, 850-869.
Hayes, C. (2019, July). The Drug Evaluation and Classification (DEC) Program Approach to Identifying Polydrug Impairment. Presented as part of the Transportation Research Board (TRB) Alcohol and Other Drugs Committee mid-year meeting webinar, Washington, DC.
Hedlund, J. (2017). Drug-Impaired Driving: A Guide for States. Washington, DC: Governors Highway Safety Association.
Hedlund, J. (2018). Drug-Impaired Driving: Marijuana and Opioids Raise Critical Issues for States. Washington, DC: Governors Highway Safety Association.
Kedia, S., Sell, M., & Relyea, G. (2007). Mono versus polydrug abuse patterns among publicly funded clients. Substance Abuse Treatment, Prevention, & Policy, 2(33), DOI: 10.1186/1747-597X-2-33.
Logan, B., Mohr, A., & Talpins, S. (2014). Detection and prevalence of drug use in arrested drivers using the Dräger Drug Test 5000 and Affiniton DrugWipe oral fluid drug screening devices. Journal of Analytical Toxicology: doi:10.1093/jat/bku050.
Ma, A. (2019, June). Colorado Case Study: Polysubstance-Impaired Driving. Presented at the National Conference of State Legislatures (NCSL) State Transportation Leaders Symposium, Denver, CO.
Ramaekers, J., Robbe, H., & O’Hanlon, J. (2000). Marijuana, alcohol and actual driving performance. Human Psychopharmacology: Clinical and Experimental, 15, 551-558.
Rocky Mountain High Intensity Drug Trafficking Area (RMHIDTA). (2019). The Legalization of Marijuana in Colorado: The Impact (Vol. 6). Denver, CO: Author.
Romano, E., Torres-Saavedra, P., Voas, R.B., et al. (2014). Drugs and alcohol: Their relative crash risk. Journal of Studies on Alcohol and Drugs, 75, 56-64.
Schulze, H., Schumacher, M., Urmeew, R., et al. (2012). DRUID Final Report: Work Performed, Main Results and Recommendations. Bergisch Gladbach, Federal Republic of Germany: Federal Highway Research Institute (BASt).
Substance Abuse and Mental Health Services Administration (SAMHSA). (2018). Key Substance Use and Mental Health Indicators in the United States: Results from the 2017 National Survey on Drug Use and Health. HHS Publication No. SMA 18-5068, NSDUH Series H-53. Rockville, MD: Center for Behavioral Health Statistics and Quality, SAMHSA.
Talpins, S., & Rogers, P. (2017). Overcoming the plateau: Reducing impaired driving by addressing drug-impaired drivers. Global Journal of Addiction & Rehabilitation Medicine, 1(4), DOI: 10.19080/GJARM.2017.01.555569.