In the months November 1996 to February 1997, the SWOV Institute for Road Safety Research and eight police control teams conducted a roadside survey. The aim was to establish the motorists' alcohol consumption in the Dutch province of South Holland. Blood alcohol content (BAC), age and sex of the drivers were collected and recorded. If the recorded BAC level was 0.7 promille or over, places of origin of the offenders were also collected and recorded. The study was carried out on Friday and Saturday evenings and nights. In total, the sample included 3138 motorists. The collected data were analysed using the Weighted Poisson Model (WPM). The results of the 1996 survey are compared with the results of the 1995 survey and, if necessary, with the results of the 1995 national survey.
Samenvatting