Drink driving in Belgium: results from the third and improved roadside survey

The percentage of drivers who were found to have a blood alcohol concentration at or above the legal limit of 0.5 g/l during weekend nights (7.68%) is significantly higher than all other time spans. These percentages for the remaining time spans do not differ significantly (weekdays: 1.76%; weekday nights: 2.99%; weekend days: 2.98%). A multilevel logistic model for Belgium was successfully fitted.