SIR – You report that the 15 motorists caught speeding through a police checkpoint in Barkerend Road last Wednesday, will be issued with warning letters and presumably not prosecuted.

The police tell us that “the message is hitting home resulting in a significant reduction in motorists exceeding the speed limit, which is brilliant”.

There is also an attitudinal change whereby speeding, as with smoking, is increasingly considered to be anti-social and dangerous.

It is therefore doubly “brilliant” in that the police have realised that appealing to motorists’ common sense is far more effective than the camera speed traps with obdurate fixed penalties.

The flashing speed limit warning signs better serve speed awareness by eliciting one’s good-natured co-operation.

John Pashley, Westcliffe Avenue, Baildon