In 1994, a speed enforcement campaign was conducted on a two-lane provincial road network in the Dutch province of Overijssel. The campaign was conducted during two phases of around three months each, before and after the summer holidays. Before the start and during the campaign information about the operation was given through the regional media. The driving speeds were evaluated by conducting measurements before the start (phase 0) and during phase 1 and phase 2. A survey conducted among car drivers showed that the automatic speed enforcement was accepted by a great majority of them. The speed level was reduced considerably in phase 1, and was increased on most road types in phase 2. The percentage of speeders in phase 2. The percentage of speeders on 100 km/h speed limit roads went down from 27% in phase 0 to 22% in phase 1, and to 19% in phase 2. For roads closed for slow vehicle types the percentages of the three phases are 59%, 49%, and 58%, respectively. For roads with a separate bicycle track these percentages are 56%, 48%, and 53%, respectively. For roads open for all vehicle types the percentages of the three phases are 47%, 28%, and 32%, respectively. It appears from the police experiences with the campaign that the national police reorganisation was a handicap to conduct the speed campaign optimally.
Samenvatting