Abstract
Some effects of doubling the number of zebra crossings in rugby and Chelmsford are described. The proportion of all drivers stopping or slowing voluntarily for pedestrians on crossings showed no change in the experimental towns after the new crossings were installed and was greater than in the towns used for controls. Pedestrian casualties were little changed in total by the introduction of the new crossings, but there were some inconsistent changes in the location of casualties in the towns studied.