Principal Investigator(s): Beck, Kenneth
Sponsor: STMD - Maryland Motor Vehicle Administration (via U.S. Department of Transportation - Federal Highway Administration)

The University of Maryland, College Park (UMCP) in partnership with the National Study Center, University of Maryland Baltimore (UMB), and the Pacific Institute for Research and Evaluation (PIRE) conducts an evaluation of the State Police Impaired Driving Reduction Effort (SPIDRE). Specifically, this project will evaluate the impact of these efforts by collecting DUI arrest and crash data, along with information concerning public perception of the risk of being caught if driving while impaired. Using a variety of methods and techniques, these data will be compared in those counties where the SPIDRE program exists (i.e., intervention counties) and where it has not occurred (i.e., comparison counties).

This will allow us to determine if enhanced enforcement efforts, alone or coupled with publicity, led to a detectable decrease in impaired driving. We will monitor the characteristics of the drivers (e.g., age, gender, BAC, location of last drink, presence of drugs other than alcohol) who were stopped and/or cited for an impaired driving offense as well as the event itself (e.g., time of day, day of week, location). This will allow us to determine if the SPIDRE efforts were associated with changes in the characteristics and circumstances of the impaired driver.