Abstract
In September 1996, the SWOV Institute for Road Safety Research and six police control teams conducted a roadside survey. The aim was to establish the motorists' alcohol consumption in the Dutch province of Utrecht. 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 nights. The 1996 sample included 1864 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 with the results of the 1995 national survey.