The Department for Transport has not assessed the effect of the frequency of the re-siting of fixed speed cameras on road safety. Any decision to re-site a fixed speed camera is entirely a matter for individual road safety partnerships and the practice is not monitored by the Department. DFT circular 01/2007, “Use of Speed and Red-light Cameras for Traffic Enforcement: Guidance on Deployment, Visibility and Signing” encourages road safety partnerships to, at least annually, review all their existing camera sites and other collision hot spots. A copy of the guidance is in the Libraries of the House and is also available on the Department’s website.