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 , International Relations Research Scientist The Calverton Center Calverton, Maryland
Phone: (301) 755-2717
Fax: (301) 755-2799
Email: tippetts@pire.org
For the past seventeen years with PIRE, Mr. Tippetts has served as the primary data analyst for more than 100 research projects in the fields of Alcohol & Drug Issues, and Traffic Safety Programs. These projects included evaluations of public policies and legislation, evaluations of private and public programs, assessment of technical equipment (accuracy, reliability), and general behavioral research (experimental, actuarial, survey, observational, and computer simulations.)
Mr. Tippetts completed 4 years of Masters and Doctorate level coursework in Public Policy, Social Conflict, Economics, and International Relations, with emphases in empirical & formal (game theoretic) modeling of sociopolitical phenomena & public policy.
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Published Literature
- Requiring interlocks to reinstate: 50% effective , Alcoholism: Clinical & Experimental Research (2012). Author(s): Voas, R. B.; and Tippetts, A. S.
- Sialic acid index of plasma apolipoprotein J (SIJ) and phosphatidylethanol (PEth): Normalization during detoxification and comparison with other emerging and traditional state markers of alcohol intake, Alcoholism: Clinical & Experimental Research (2012). Author(s): Wurst, F. M.; Thon, N.; Weinmann, W.; Tippetts, S.; Marques, P.; Hahn, J. A.; and ...Lakshman, R.
- An Evaluation of Intensive Supervision Programs for Serious DWI Offenders (2011). Author(s): Tippetts, S.; Fell, J.; McKnight, S.; and Wiliszowski, C.
- An evaluation of three driving-under-the-influence courts in Georgia. , Alcoholism-Clinical and Experimental Research (2011). Author(s): Tippetts, A. S.; Fell, J. C.; and Ciccel, J. D.
- An Evaluation of Three Georgia DUI Courts (2011). Author(s): Fell, J. C.; Tippetts, S. A.; and Langston, E. A.
- Estimating driver risk using alcohol biomarkers, interlock blood alcohol concentration tests and psychometric assessments: initial descriptives, Addiction (2010). Author(s): Tippetts, S.; Marques, P.; Javors, M.; Wurst, F.; Pragst, F.; Yegles, M.; Alling, C.; and Allen, J.
- Changes in alcohol-involved fatal crashes associated with tougher state alcohol legislation, Alcoholism, Clinical and Experimental Research (2009). Author(s): Voas, R. B.; Fisher, D. A.; Tippetts, A. S.; Fell, J. C.; and Blackman, K.
- Evaluation of seven publicized enforcement demonstration programs to reduce impaired driving: Georgia, Louisiana, Pennsylvania, Tennessee, Texas, Indiana, and Michigan, Annual Proceedings / Association for the Advancement of Automotive Medicine (2008). Author(s): Tippetts, A. S.; and Fell, J. C.
- Evaluation of seven publicized enforcement programs to reduce impaired driving: Georgia, Louisiana, Pennsylvania, Tennessee, Indiana, Michigan, and Texas (2008). Author(s): Tippetts, A.S.; Langston, E.A.; Fell, J.C.; Cotton, R.; and Lacey, J. H.
- Impaired motorcycle operation, final report, volume I: Riders helping riders evaluation (2008). Author(s): Tippetts, A. Scott; Becker, Les R.; and McKnight, A. Scott
- The relationship of underage drinking laws to reductions in drinking drivers in fatal crashes in the United States, Accident; Analysis and Prevention (2008). Author(s): Voas, R. B.; Fisher, D. A.; Tippetts, A. S.; Fell, J. C.; and Blackman, K.
- Alcohol involvement in fatal crashes under three crash exposure measures, Traffic Injury Prevention (2007). Author(s): Voas, R. B.; Fisher, D. A.; Tippetts, A. S.; Romano, E.; and Kelley-Baker, T.
- Drinking characteristics of drivers arrested for driving while intoxicated, in Proceedings of the T2007 Joint International Meeting of TIAFT/ICADTS/IIS, August 26-30 (2007). Author(s): Voas, R.B.; Tippetts, A. S.; and Fell, J.C.
- Impact of primary safety belt laws on alcohol-related front-seat occupant fatalities: five case studies, Traffic Injury Prevention (2007). Author(s): Voas, R. B.; Tippetts, A. S.; Fell, J. C.; Blackman, K.; and Nichols, J. L.
- Motivational intervention keyed to interlock use reduces the rate of positive BAC tests, in Proceedings of the T2007 Joint International Meeting of TIAFT/ICADTS/IIS, August 26-30 (2007). Author(s): Tippetts, S.; Voas, R.; Marques, P.; Timken, D.; Blackman, K.; and Field, C.
- The relationship of 16 underage drinking laws to reductions in underage drinking drivers in fatal crashes in the United States, in 51st Annual Proceedings of the Association for the Advancement of Automotive Medicine, October 15-16, 2007 (2007). Author(s): Tippetts, A. S.; Fell, J.C.; Fisher, D.A.; Blackman, K.; and Voas, R.B.
- The relationship of 16 underage drinking laws to reductions in underage drinking drivers in fatal crashes in the United States, Annual Proceedings / Association for the Advancement of Automotive Medicine (2007). Author(s): Voas, R. B.; Fisher, D. A.; Tippetts, A. S.; Fell, J. C.; and Blackman, K.
- Language, income, education, and alcohol-related fatal motor vehicle crashes, Journal of Ethnicity in Substance Abuse (2006). Author(s): Romano, E. O.; Voas, R. B.; and Tippets, A. S.
- Minimum purchasing age for alcohol and traffic crash injuries among 15- to 19-year-olds in New Zealand, American Journal of Public Health (2006). Author(s): Kypri, K.; Voas, R.B.; Langley, J.D.; Stephenson, S.C.; Begg, D.J.; Tippetts, A.S.; and Davie, G.S.
- Stop sign violations: The role of race and ethnicity on fatal crashes, Journal Of Safety Research (2006). Author(s): Romano, E.; Voas, R.; and Tippetts, S.
- A meta-analysis of .08 BAC laws in 19 jurisdictions in the United States, Accident Analysis and Prevention (2005). Author(s): Tippetts, A.S.; Voas, R.B.; Fell, J.C.; and Nichols, J.L.
- Acculturation, income, education, safety belt use, and fatal motor vehicle crashes in California, Prevention Science (2005). Author(s): Romano, Eduardo; Tippetts, Scott; Blackman, Kenneth; and Voas, Robert
- DWI offenders' failure to reinstate driver's licenses: volume 1– summary (2005). Author(s): Voas, R.; McKnight, A. Scott; and Tippetts, A. S.
- Fatal red light crashes: the role of race and ethnicity, Accident Analysis and Prevention (2005). Author(s): Romano, E.; Tippetts, S.; and Voas, R.
- Stop sign violations: The role of race and ethnicity on alcohol-related fatal crashes, Alcoholism: Clinical and Experimental Research (2005). Author(s): Romano, E; Tippetts, S.; and Voas, R.,
- Do rural drivers pose greater alcohol impaired driving risks? Driver record, questionnaire, and interlock BAC data as proxies for risk, in Proceedings of the 17th International Conference on Alcohol, Drugs and Traffic Safety, August 8-13, 2004 (2004). Author(s): Marques, P. R.; Tippetts, A.S.; and Voas, R. B.
- Hispanic acculturation and drinking and driving perceptions: Preliminary results, Alcoholism: Clinical and Experimental Research (2004). Author(s): Romano, E.; Tippetts, A. S.; and Voas, R.
- The relationship between increases in safety belt use and reductions in alcohol-related traffic fatalities (2004). Author(s): Tippetts, A.S.; Nichols, J.L.; Voas, R.B.; and Fell, J.C.
- Assessing the effectiveness of minimum legal drinking age and zero tolerance laws in the United States, Accident Analysis and Prevention (2003). Author(s): Voas, R.B.; Tippetts, A.S.; and Fell, J.
- Behavioral measures of drinking: Patterns in the interlock record, Addiction (2003). Author(s): Marques, P.R.; Voas, R.B.; and Tippetts, A. Scott
- Comparative and joint prediction of DUI recidivism from alcohol ignition interlock and driver records, Journal of Studies on Alcohol (2003). Author(s): Marques, Paul R.; Tippetts, A.S.; and Voas, R. B.
- The alcohol interlock: An underutilized resource for predicting and controlling drunk drivers, Traffic Injury Prevention (2003). Author(s): Marques, P.R.; Tippetts, A. S.; and Voas, R.B
- The impact of mandatory versus voluntary participation in the Alberta Ignition Interlock Program, Traffic Injury Prevention (2003). Author(s): Beirness, D.J.; Marques, P.R.; Voas, R.B.; and Tippetts, A.S.
- BACs of U.S. drivers in fatal crashes: Have they changed in the last 20 years?, in Proceedings of Alcohol, Drugs & Traffic Safety - T 2002: 16th International Conference on Alcohol, Drugs & Traffic Safety, August 4-9, 2002 (2002). Author(s): Voas, R.B.; and Tippetts, A.S.
- Children in fatal crashes: Driver blood alcohol concentration and demographics of child passengers and their drivers, Addiction (2002). Author(s): Voas, R. B.; Fisher, Deborah A.; and Tippetts, A. Scott
- During alcohol interlock use, elevated BACs in morning or declining vehicle use over time predicts post-interlock recidivism, in Proceedings of the 16th International Conference on Alcohol, Drugs & Traffic Safety, August 4–9, 2002 (2002). Author(s): Marques, P.R.; Tippetts, A.S.; and Voas, R.B.
- Effectiveness of the Illinois .08 law (2002). Author(s): Voas, R. B.; Tippetts, A.Scott; Taylor, Eileen P.; Kelley Baker, Tara; and Lacey, John
- Evaluation of a program to motivate impaired driving offenders to install ignition interlocks, Accident Analysis and Prevention (2002). Author(s): Voas, Robert B.; Blackman, K. O.; Tippetts, A. S.; and Marques, P. R.
- Odds that an involved driver was drinking: Best indicator of an alcohol-related crash?, in Proceedings of the 16th International Conference on Alcohol, Drugs and Traffic Safety (2002). Author(s): Tippetts, A.S.; and Voas, R.B.
- Operation Safe Crossing: Using science within a community intervention, Addiction (2002). Author(s): Voas, R. B.; Tippetts, A.S.; Johnson, M.B.; Lange, J.E.; and Baker, J.
- The Illinois .08 law: An evaluation, Journal of Safety Research (2002). Author(s): Voas, R. B.; Tippetts, A. Scott; and Taylor, Eileen P.
- Are there recidivism differences if alcohol interlocks are required not elected? (Abstract No. 561), Alcoholism: Clinical and Experimental Research (2001). Author(s): Marques, P.R.; Voas, R.B.; Beirness, D. J.; and Tippetts, A. S.
- Drinking drivers in fatal crashes: Variations across age, gender, and ethnic groups, in 45th Annual Proceedings of the Association for the Advancement of Automotive Medicine, San Antonio, Texas, September 24-26, 2001 (2001). Author(s): Voas, R.B.; Tippetts, A.S.; and Fisher, D.A.
- Effectiveness of the Illinois .08 law: An update with the 1999 FARS data (2001). Author(s): Voas, R. B.; Tippetts, A. S.; and Taylor, E.P.
- Enforcement of zero tolerance in the state of Washington — Evidence from breath-test records, Forensic Science Review (2001). Author(s): Blackman, K. O.; Voas, R.B.; Gullberg, R.G.; and Tippetts, A. S.
- Ethnic differences in alcohol-related crash involvement (Abstract No. 516), Alcoholism: Clinical and Experimental Research (2001). Author(s): Voas, R.B.; Tippetts, A. S.; and Fisher, D. A.
- Evaluation of a program to motivate impaired driving offenders to install ignition interlocks, in 45th Annual Proceedings of the Association for the Advancement of Automotive Medicine, San Antonio, TX, September 24-26, 2001 (2001). Author(s): Voas, R.B.; Blackman, K.O.; Tippetts,A.S.; and Marques, P.R.
- Motivating DUI offenders to install interlocks: Avoiding jail as an incentive, Alcoholism: Clinical and Experimental Research (2001). Author(s): Voas, R. B.; Blackman, K. O.; Tippetts, A.S.; and Marques, P.R.
- Predicting repeat DUI offenses with the alcohol interlock recorder, Accident Analysis and Prevention (2001). Author(s): Marques, Paul R.; Tippetts, A. Scott; Voas, R. B.; and Beirness, Douglas J.
- BAC failures in alcohol interlock record strongly predict repeat DUI offenses after license reinstatement, in Supplement to Alcoholism. Clinical and Experimental Research. 2000 Scientific Meeting of the Research Society on Alcoholism. June 24-29, 2000—Denver, CO (2000). Author(s): Marques, P.R.; Voas, R.B.; and Tippetts, A.S.
- Child endangerment: Differences across racial and ethnic groups in the U.S. in driver alcohol use and restraint of child passengers – Driver Characteristics Section, in Alcohol, Drugs and Traffic Safety – T 2000: Proceedings of the 15th International Conference on Alcohol, Drugs and Traffic Safety, May 22-26, 2000 (2000). Author(s): Voas, R.B.; Fisher, D.A.; and Tippetts, A.S.
- Circumventing the alcohol safety interlock: The effect of the availability of a noninterlock vehicle, in Alcohol, Drugs and Traffic Safety – T 2000: Proceedings of the 15th International Conference on Alcohol, Drugs and Traffic Safety, May 22-26, 2000 (2000). Author(s): Voas, R. B.; Marques, Paul R.; Tippetts, A.S.; and Beirness, D.
- Crash-related injury risks to child passengers: Driver alcohol use and failure to use restraints, in 44th Annual Proceedings of the Association for the Advancement of Automotive Medicine, Chicago, Illinois, October 2-4, 2000 (2000). Author(s): Fisher, D.A.; Voas, R.B.; and Tippetts, A.S.
- Driver alcohol use and risks to child passengers, in Supplement to Alcoholism. Clinical and Experimental Research. 2000 Scientific Meeting of the Research Society on Alcoholism. June 24-29, 2000—Denver, CO (2000). Author(s): Voas, R.B.; Fisher, D.A.; and Tippetts, A.S.
- Effectiveness of the Ohio vehicle action and administrative license suspension laws (2000). Author(s): Voas, R.B.; Tippetts, A. S.; and Taylor, E.P.
- Ethnicity and alcohol-related fatalities: 1990 to 1994 (2000). Author(s): Voas, R. B.; Tippetts, A. Scott; and Fisher, Deborah A.
- Examining alcohol involvement and demographic factors in pedestrian and cyclist fatalities, in Supplement to Alcoholism. Clinical and Experimental Research. 2000 Scientific Meeting of the Research Society on Alcoholism. June 24-29, 2000—Denver, CO (2000). Author(s): Voas, R.B.; Fisher, D.A.; and Tippetts, A.S.
- Operation Safe Crossing: Using science within a community intervention, in Alcohol, Drugs and Traffic Safety – T 2000: Proceedings of the 15th International Conference on Alcohol, Drugs and Traffic Safety, May 22-26, 2000 (2000). Author(s): Voas, R.B.; Lange, J.E.; Tippetts, A.S.; and Johnson, M.B.
- Predictors of failed interlock BAC tests and using failed BAC test to predict post-interlock repeat DUIs – Alcohol Ignition Interlock Device Section, in Alcohol, Drugs and Traffic Safety – T 2000: Proceedings of the 15th International Conference on Alcohol, Drugs and Traffic Safety, May 22-26, 2000 (2000). Author(s): Marques, P.; Voas, R.B.; Tippetts, A.S.; and Beirness, D.J.
- Support services provided during interlock usage and post-interlock repeat DUI: Outcomes and processes – Alcohol Ignition Interlock Device Section, in Alcohol, Drugs and Traffic Safety – T 2000: Proceedings of the 15th International Conference on Alcohol, Drugs and Traffic Safety, May 22-26, 2000 (2000). Author(s): Marques, P.R.; Tippetts, A.S.; Voas, R.B.; Danseco, E.R.; and Beirness, D.R.
- The impact of mandatory versus voluntary participation in the Alberta ignition interlock program, in Alcohol, Drugs and Traffic Safety – T 2000: Proceedings of the 15th International Conference on Alcohol, Drugs and Traffic Safety, May 22-26, 2000 (2000). Author(s): Beirness, D.J.; Marques, P.M.; Voas, R.B.; and Tippetts, A.S.
- The relationship of alcohol safety laws to drinking drivers in fatal crashes, Accident Analysis and Prevention (2000). Author(s): Voas, R.B.; Tippetts, A.S.; and Fell, J.C.
- Behavioral monitoring of DUI offenders with the alcohol ignition interlock recorder, Addiction (1999). Author(s): Marques, Paul R.; Voas, R. B.; Tippetts, A. Scott; and Beirness, Douglas J.
- Hispanic drinking drivers in fatal crashes in the USA, in 43rd Annual Proceedings of the Association for the Advancement of Automotive Medicine, Barcelona (Sitges), Spain, September 20-21, 1999 (1999). Author(s): Fell, J.; Voas, R.B.; Tippetts, A.S.; and Fisher, D.A.
- The Alberta Interlock Program: The evaluation of a province-wide program on DUI recidivism, Addiction (1999). Author(s): Voas, R. B.; Marques, Paul R.; Tippetts, A. Scott; and Beirness, D.J.
- The United States limits drinking by youth under age 21: Does this reduce fatal crash involvements?, in 43rd Annual Proceedings of the Association for the Advancement of Automotive Medicine, September 20-21, 1999, Barcelona (Sitges), Spain (1999). Author(s): Voas, R.B.; Tippetts, A.S.; and Fell, J.C.
- Enforcement of the zero tolerance law in California: A missed opportunity?, in 42nd Annual Proceedings of the Association for the Advancement of Automotive Medicine, Charlottesville, VA, October 5-7, 1998 (1998). Author(s): Voas, R. B.; Lange, James E.; and Tippetts, A. Scott
- Impact of Ohio administrative license suspension, in 42nd Annual Proceedings, Association for the Advancement of Automotive Medicine Charlottesville, VA, October 5-7, 1998 (1998). Author(s): Voas, R.B.; Tippetts, A.S.; and Taylor, E.P.
- Temporary vehicle impoundment in Ohio: A replication and confirmation, Accident Analysis and Prevention (1998). Author(s): Voas, R.B.; Tippetts, A.S.; and Taylor, E.
- The effect of lane line width and contrast upon lanekeeping, Accident Analysis and Prevention (1998). Author(s): McKnight, A.S.; McKnight, A. J.; and Tippetts, A. S.
- The effectiveness of the West Virginia interlock program, Journal of Traffic Medicine (1998). Author(s): Tippetts, A. Scott; and Voas, R. B.
- Accident prevention versus recidivism prevention courses for repeat traffic offenders, Accident Analysis and Prevention (1997). Author(s): McKnight, A.J.; and Tippetts, A. S.
- Estimating blood alcohol level from observable signs, Accident Analysis and Prevention (1997). Author(s): McKnight, A. James; Langston, Elizabeth A.; Marques, Paul R.; and Tippetts, A. Scott
- Evaluation of a method for reducing unlicensed driving: The Washington and Oregon license plate sticker laws, Accident Analysis and Prevention (1997). Author(s): Voas, R. B.; Tippetts, A.S.; and Lange, J.E.
- Evaluation of the Alberta ignition interlock program: Preliminary results, in Proceedings of the 14th International Conference on Alcohol, Drugs and Traffic Safety – T97, Annecy, 21 September – 26 September 1997 (1997). Author(s): Beirness, D.J.; Marques, P.R.; Voas, R. B.; and Tippetts, A. S.
- Temporary vehicle immobilization: Evaluation of a program in Ohio, Accident Analysis and Prevention (1997). Author(s): Voas, R.B.; Tippetts, A.S.; and Taylor, E.
- The effectiveness of the West Virginia interlock program on second drunk-driving offenders, in Proceedings of the 14th International Conference on Alcohol, Drugs and Traffic Safety – T97, Annecy, 21 – 26 September 1997 (1997). Author(s): Tippetts, A.Scott; and Voas, R. B.
- Are licensing sanctions effective at reducing impaired driving, in Transportation Research Circular: Progress and promise in alcohol, other drugs and transportation (1996). Author(s): Voas, R. B.; and Tippetts, A.S.
- Compensating for deficiencies in perinatal data sets: Parametric perspectives, in Treatment for Drug-Exposed Women and Their Children: Advances in Research Methodology (1996). Author(s): Tippetts, A.S.; and Marques, P.R.
- Intervention outcomes after 2-year followup of cocaine-using post-partum mothers, in Problems of drug dependence, 1995: Proceedings of the 57th Annual Scientific Meeting (1996). Author(s): Marques, P. R.; Tippetts, A. S.; and Branch, D. G.
- The effect of vehicle impoundment and immobilization on driving offenses of suspended and repeat DWI drivers, in 40th Annual Proceedings of the Association for the Advancement of Automotive Medicine (1996). Author(s): Voas, R. B.; Tippetts, A.S.; and Taylor, E.P.
- Unlicensed driving by DUIs—A major safety problem?, in Transportation Research Circular; Progress and Promise in Alcohol, Other Drugs and Transportation (1996). Author(s): Voas, R. B.; and Tippetts, A.S.
- Dealing with deficiencies in perinatal data sets, NIDA Monograph (1995). Author(s): Tippetts, A.S; and Marques, P.R.
- Evaluation of Washington and Oregon license plate sticker laws, in 39th Annual Proceedings of the Association for the Advancement of Automotive Medicine (AAAM) (1995). Author(s): Voas, R. B.; and Tippetts, A.S.
- Motivating anti-DWI behavior using existing values (1995). Author(s): Stewart, Kathryn; Taylor, E.; Tippetts, S.; and (et al.)
- The effect of width and contrast of lane delineation upon lanekeeping (1995). Author(s): McKnight, A.S.; McKnight, A.J.; and Tippetts, A.S.
- Assessment of impoundment and forfeiture laws for drivers convicted of DUI. Phase II Report: evaluation of Oregon and Washington vehicle plate zebra sticker laws (1994). Author(s): Voas, R.B.; and Tippetts, A.S.
- Birth outcome not correlated with late-term cocaine exposure within an exposed sample, in Problems of Drug Dependence, 1994: Proceedings of the 56th Annual Scientific Meeting (1994). Author(s): Marques, P. R.; Tippetts, A. S.; and Branch, D. G.
- Development of a system for DUI recidivism risk projection (1994). Author(s): Tippetts, A.S.; and McKnight, A.J.
- Cocaine in the hair of mother-infant pairs: Quantitative analysis and correlations with urine and self-report, American Journal of Drug and Alcohol Abuse (1993). Author(s): Marques, P.R.; Tippetts, A.S.; and Branch, D.G.
- Cocaine levels in mother and infant hair: Correlations with levels in urine and self-report, in Problems of Drug Dependence, 1993: Proceedings of the 55th Annual Scientific Meeting (1993). Author(s): Marques, P.R.; Tippetts, A.S.; and Branch, D.G.
- Discriminant Analysis of Signs of Drug Impairment, in Alcohol, Drugs and Traffic Safety – T92: Proceedings of the 12th International Conference on Alcohol, Drugs and Traffic Safety, Cologne, 28 September – 2 October 1992 (1993). Author(s): Voas, R. B.; Tippetts, A.S.; and Hemmans, R.A.
- Evaluation of the field certification process for drug recognition experts (DREs), in Alcohol, drugs and traffic safety – T92: Proceedings of the 12th International Conference on Alcohol, Drugs and Traffic Safety, Cologne, 28 September – 2 October 1992 (1993). Author(s): Shinar, D.; Voas, R. B.; Langston, E.A.; and Tippetts, A.S.
- Factors related to judicial assignment of DWI offenders to treatment, in Alcohol, drugs and traffic safety – T92: Proceedings of the 12th International Conference on Alcohol, Drugs and Traffic Safety, Cologne, 28 September – 2 October 1992 (1993). Author(s): Voas, R. B.; Tippetts, A.S.; and Perrine, M.W.
- Age, alcohol and accidents (1991). Author(s): Tippetts, A.S.; McKnight, A.J.; and Voas, R. B.
- Evaluation of the training-for-certification of drug recognition experts (DRTs) (1991). Author(s): Voas, R. B.; Burns, M.; Langston, E.A.; and Tippetts,A.S.
- Evaluation of treatment and monitoring programs for drunk drivers, Journal of Traffic Medicine (1990). Author(s): Voas, R.B.; and Tippetts, A.S.
- Provisional driver licenses system for follow-up evaluation of Maryland youth license control demonstration project (1990). Author(s): McKnight, A.J.; Tippetts, A.S.; and Marques, P.R.
- Screening motorists for alcohol: Comparison of passive sensing with nystagmus testing (1990). Author(s): Voas, R. B.; and Tippetts, A.S.
- The relation of medical advisory board referral to recidivism among Maryland drinking-driving offenders (1990). Author(s): McKnight, A.J.; and Tippetts, A.S.
- Follow-up evaluation of Maryland youth license control demonstration project (1989). Author(s): McKnight, A.J.; and Tippetts, A.S.
- Maryland State Police crash analysis: Impact of safety belt use (1989). Author(s): McKnight, A.J.; and Tippetts, A.S.
- The effect of a belt use program and mandatory use law upon the extent of injury among law enforcement officers (1989). Author(s): McKnight, A.J.; and Tippetts, A.S.
- The effect of the 65 MPH limit on speeds and accidents (1989). Author(s): McKnight, A.J.; Klein, T.M.; and Tippetts, A.S.
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