I am a Parish Councillor in a Northumberland village and the County Highways have a policy to put in metre-wide speed humps as, they claim, inter alia, that full road-width humps are more damaging to things like buses. I think they're trying to do things on the cheap 'cos the sloping sides of the humps are wearing and becoming sharp thus putting us at risk of damaging our inner tyre walls and creating potential risk of blow-outs on open roads or motorways.

One of my sons lives in Rochdale where the Council puts speed humps across the entire road width noticeably outside schools where school buses drop off and pick up kids. If that's dangerous here why is it OK in Rochdale or do they have buses made of sterner stuff there?

I'm going to campaign to stop the County Council here installing potentially dangerous models of speed humps and I need anything you've published (or other technical reports you may have) which could suppoort my view.