Why are automatic number plate readers on speed cameras so inaccurate?

I was surprised to receive a Notice of Intended Prosecution (NIP) for allegedly travelling at 56mph along a stretch of dual carriageway I know has a 40mph speed limit - which I do consciously try to observe....

Where does the money from speed cameras go?

I have recently been dunned for £60 for speeding by an unmanned camera, all, apparently, in the interests of road safety. This raises the question of who audits the money? I feel that it merely goes to...

Was a lorry driver exonerated in court for warning oncoming drivers of a speed trap?

Many years ago I believe you ran a item in your pages concerning a lorry driver being found guilty by police for warning drivers of a speed check/trap, but on appeal to the law lords he was exonerated....