Two measures were taken for providing a separation of directions on the Oostburg ring road. The first measure was the application of strips on the northern part of the ring road (the location at which the preliminary study had been conducted). These strips, 70 cm long, 17 cm wide and 4.5 cm high, were attached to the asphalt between the continuous white paint stripes in the middle of the carriageway. The second measure was to use flexible bollards on the southern part of the ring road. These bollards are trapezium-shaped, being 14 cm thick at the bottom and 8 cm thick at the top, and 28 cm tall. The distance between the strips and the bollards for the first 100 metres contiguous to the roundabout was five metres, and 10 metres thereafter. The SWOV Institute for Road Safety Research conducted another study into the overtaking behaviour on both ring road sections. Both measures appeared to have a benefical effect: no overtaking manoeuvres were observed. The average speed on the part of the ring road where the strips had been applied has been reduced to 80 km/h, and the percentage of speed violators has been reduced to 40.4%. Both reductions were more evident in the case of passenger cars and motorcycles than in lorries. See also C 7529 (IRRD 890083).
Samenvatting