2007 National Roadside Survey of Alcohol and Drug Use by Drivers 

2007 National Roadside Survey (NRS) is a national field survey of alcohol- and drug-involved driving conducted primarily among nighttime weekend drivers, but also daytime Friday drivers. The survey involved randomly stopping drivers at 300 locations across the continental United States; sites were selected through a stratified random sampling procedure. This included data that we collected during a two-hour Friday daytime session at 60 locations and during four 2-hour nighttime periods (10:00 p.m. to midnight and 1:00 a.m. to 3:00 a.m. on both Friday and Saturday) at 240 locations.

Methodology (DOT HS 811 237)
This report describes the methodology for the 2007 NRS.

Alcohol Results (DOT HS 811 248)
This report presents the prevalence estimates for alcohol-involved driving derived from the recently completed 2007 NRS and compares those estimates with the three previous National Roadside Surveys.

Drug Results (DOT HS 811 249)
This report - available soon - presents the first national prevalence estimates for drug-involved driving derived from the recently completed 2007 NRS.