'The UK External Vehicle Speed Control (EVSC) project has made a
prediction of the accident savings with intelligent speed
adaptation (ISA), and estimated the costs and benefits of national
implementation. The best prediction of accident reduction
was that the fitting on all vehicles of a simple mandatory system,
with which it would be impossible for vehicles to exceed the speed
limit, would save 20% of injury accidents and 37% of fatal
accidents. A more complex version of the mandatory system,
including a capability to respond to current network and weather
conditions, would result in a reduction of 36% in injury accidents
and 59% in fatal accidents. The implementation path recommended by
the project would lead to compulsory usage in 2019. The
costbenefit analysis carried out showed that the benefitcost
ratios for this implementation strategy were in a range from 7.9 to
15.4, i.e. the payback for the system could be up to 15 times the
cost of implementing and running it.'
(Accident Analysis & Prevention.Volume 37, Issue 3 , May 2005,
Pages 407-416 )
For more,
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V5S-4FBM1FT-1&_user=10&_handle=V-WA-A-W-WC-MsSAYZA-UUW-U-AAWWZEEZEY-AAWUWYUVEY-WUWUAEYCY-WC-U&_fmt=summary&_coverDate=05%2F31%2F2005&_rdoc=5&_orig=browse&_srch=%23toc%235794%232005%23999629996%23585705%21&_cdi=5794&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=84fbc9028e8e75f2527837cc3804fb81
