Experiences with new roundabouts in the Netherlands.

Since 1986, over 200 roundabouts have been built in The Netherlands, most of them in built up areas. The new roundabouts are characterised by pure circular design, narrow carriageway and approach roads (one lane), radially oriented approach roads, small dimensions and right of way for traffic on the roundabout (off-side priority). The results of several research projects show good safety levels for all kinds of traffic users and capacities of more than 2000 motor vehicles per hour. Special attention is given to the various solutions for cyclists and their safety. This year a second safety study was started, using the accident records of about 150 roundabouts, to get more insight in the safety related to the various options. There is now a growing interest in larger roundabouts with two-lane carriageways and off-side priority, and in changing the right of way on older roundabouts from near-side to off-side priority.