Abstract
Panels showing advised maximum speeds for bends have been attached to bend warning signs on some 150 bends in East Sussex Dorset and Worcestershire. Observations of their effects on speeds and on accidents have been made over a period of two years since they were erected. Average speeds of the vehicles in the bends were affected by the signs when the signs showed a speed different from the mean speed of vehicles before the signs were erected. The main speed moved toward the advice given by the sign.