Map of London cyclist deaths

Found this a while ago

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=http:%2F%2Froad.cc%2Fsites%2Fdefault%2Ffiles%2F2007.kml&sll=51.547202,-0.069669&sspn=0.009834,0.018497&ie=UTF8&ll=51.54783,-0.119133&spn=0.157348,0.295944&z=12

Think it's just incidents though, no difference made re what type of accident is marked. Still pretty useful though to check what junctions / roads / areas are more dangerous than other.
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Surely this is valuable info when it comes to road planning?**

Not really, without some sort of normalization i.e accidents peruser and analysis of the type of junction e.g design 1 ,2, 3, analysis of what other traffic uses that junction it's hard to draw any good conclusions. Raw numbers don't help here, there maybe a very bad junction in Coventry which has had one death over the past 10 ears but a junction that's design is not ideal but not as bads as Coventry's that has had 5 deaths over the past 10 years.