Increasing visibility of speed cameras might increase deaths and injuries on roads

EDITOR—In December 2001 the government announced changes to the colour and positioning of speed cameras.1 But what will the effect be on deaths and injuries caused by road traffic collisions related to speed? And where is the evidence for this change in policy?

Interventions to control speed seek to reduce both the likelihood and the severity of a collision. The setting of appropriate speed limits is a major strand of this preventive action, and speed cameras are one of the main methods of enforcing …