More or fewer accidents at lights?

http://www.drianwalker.com/ & bamboobadger.blogspot.com/ are very good. A propos, the DfT doesn't distinguish between "accidents" at junctions with or without signal control. A London policeman once told me that at least half the accidents he attends occur at signal controlled junctions. To my mind, accidents are rarely accidents. More often than not they are events contrived by the rules of the road.