It is proposed that car drivers who also ride bicycles on a regular basis are more aware of cyclists when driving. Two groups of motorists are recruited, balanced for age, driving experience, acuity and so on. One group cycles a minimum of 10 miles per week, the other a maximum of 5 miles per month. Each participant is shown two film clips. After seeing both clips it is explained that there was a cyclist in a potentially dangerous position in one clip but not the other. The participants were classified as to whether they could correctly identify which clip was which.