The argument over how to tackle speed on our roads needs to be settled once and for all.

Motorists are getting mixed messages, with the Metropolitan Police saying they will remove some cameras, while other forces plan to increase their number.

There is no doubt Speed cameras have done more than anything to alienate police from the public.

They are catching an increasing number of otherwise law-abiding citizens.

It is also true that the element of surprise has diminished -- most drivers know where the cameras are, and slow down as they pass them, then speed up.

Speed cameras are not a panacea for preventing all road accidents.

But the fact remains that they have a part to play in road safety, particularly at accident blackspots.

Some people argue that cameras should be replaced by more flashing speed limit signs, where motorists get a gentle warning but no fine.

But human nature as it is, will our growing army of speeding drivers take any notice of them? We doubt it.