Abstract
One of the studies connected with the demonstration projects on cycling in a big city and a middle-sized town in the Netherlands deals with the usage of these cycle tracks. The article gives an introduction on the total study design and the objectives. It specifies the actual stage of implementation and gives major results of traffic counts. The main conclusions are that bicycle usage in both towns has increased, especially for non-compulsory trips. The special tracks attract many cyclists from parallel routes, the "catchment area" stretching for about a sixth of a mile both sides of the track. There is only a slight influence on mode choice. There are only minor effects on public transport usage.