As regards what Wench said about the money covering the expenses only - the rest to the gov I'd like to know how much they are
The last audited 12 month period I can find is the 2003/04 financial year that ended on 31 March 2004. The total fine receipts for speeding and red light offences detected by fixed and mobile cameras was £113,549,240.
Of this amount, £91,848,844 was reinvested in road safety as payments back to the partnerships including the Police, local highway authorities and Magistrates' Courts who operate within the safety camera programme. The amount retained by the Treasury was £21,700,396 which is the difference.
As for the reason for speed limits, I personally would love to see anyone caught at stupid speeds (not a few mph over the limit) be made to sit in Resus when the results of such speeds come in so that they can see and smell and hear the end result. It's all very well saying "it won't be me that crashes/runs someone over/kills someone" but that's what they all say!!
It also makes me laugh when some of the people who bitch about speed limits are the first to kick off about how the Police should have done something when one of their loved ones or friends is hit by a speeding car. Different story then isn't it!!