I have had a couple of email exchanges with a chap from DfT: I was a tad cross when I wrote this so apologise for any factual errors or speaking out of turn etc. The ealier correspondence referred to was along the lines of the previous one posted here ie blah blah blah ..30% etc...blah blah.
HERE IS MY EMAIL:
Dear xxxxxx,
Thanks for your email.
Please consider that the collection of stats which result in your assertation that speed is a contributory factor in 30% of road casualties is generally disregarded by many people who take an interest in this topic. Speed enforcement can only address casualties where the speeds involved exceed a posted limit and the 30% figure does not compensate for that. The analysis is too simplistic and other factors in most accidents are in fact more important. DoT's own figures put the 'speed' factor at 5 to 12% (as with all data how the information is interperated can swing the result considerably).
Arbitary limits (and any blanket change) are ineffective in addressing the true accident causes which include inattention etc and specific hazzards at discrete locations (hidden exits, mud on corners) etc which are genuine problems in rural driving. At 50mph I suspect that most of these problems would be just a dangerous as is the case now.
All that 50mph would mean is slower progress between the hazards, so it won't achieve anything.
A serious approach to this issue requires investment in driver training, (on-going possibly?) and road engineering at hazard areas. Maybe signage can contribute? Much technology exists but imagination seems to end with the 'speed camera'. Why is that?
On the subject of emmissions: if the vehicle fleet is showing an ever improving per mile performance in that area, a long term policy such as speed limits should not concern itself with that as a factor. Only safety should be considered, and I think that the disconnect between arbitary speed limits and casuality reduction makes is plain that another weapon is needed now.
Modern vehicles can travel in safety at far higher speeds than the limits set allow at present for the majority of the length of the road network. The issue is with specific points of the road and the problem is driver hazard perception. Technology can help but training I think is key.
Regards
HERE IS THE REPLY:
Thank you for your further e-mail about speed limits. Your comments have been noted.
The Department’s road safety policies are based on a large body of evidence from research and from evaluation of interventions in the field. The evidence shows a strong link between speed and road collisions. Reduction in speed reduces the impact of a collision (and thus reduces the likely severity of any injuries resulting from it), as well as the probability of a collision. The evidence also shows that speed cameras are highly effective in reducing speeds, and shows substantial reductions in casualties at camera sites.
The Department recognise that safety cameras are not the only tool for casualty reduction, nor are they always the most appropriate one to use; and it is left to the discretion of individual safety partnerships what combination of measures they use to address the problem of casualties on their roads. The Department’s Road Safety Strategy ‘Tomorrow’s roads: safer for everyone’ focuses on a range of issues including driver behaviour, driver training and safer infrastructure.
Full details of road safety policy – including the strategy, research reports and guidance to local authorities - can be found in the Road Safety section of the Department for Transport web site at:
http://www.dft.gov.uk/pgr/roadsafety/Statistical information can be found at:
http://www.dft.gov.uk/pgr/statistics/Yours sincerely,
xxxx xxxxx
Speed Policy
Road User Safety Division
Department for Transport
2/13 Great Minster House
76 Marsham Street
London SW1P 4DR