Author Topic: Some interesting stats  (Read 104 times)

Some interesting stats
« on: May 26, 2020, 04:19:19 pm »
I've done a little bit of analysis regarding crashes and road type, between 2015 and 2018.
Please note that the data is poor. We have a minimum threshold of 10 mn vehicle miles on the traffic data, and it doesn't differentiate between dual and single carriageway.

Fatal crashes:
2 - Motorway (M3 & M40) - 0.00 bn vehicle miles. Fatalities per bn mile - ∞

107 - all rural A roads - 0.52 bn vehicle miles. Fatalities per bn miles - 206 (4.85 mn miles per fatality).
124 - all urban A roads - 1.8 bn vehicle miles. Fatalities per bn miles - 69 (14.5 mn miles per fatality).


Breakdown by carriageway / speed limit:
21 - Dual Carriageway A road (70 mph). 3 urban.
39 - Single Carriageway A road (60 mph). 1 urban.
4 - Dual Carriageway A road (60 mph).
3 - 60 mph A road roundabout. 1 urban.
14 - Dual Carriageway A road (50 mph). 5 of which urban.
22 - Single Carriageway A road (50 mph). 3 urban.
10 - SC 40, 13 - DC 40.
64 - SC 30, 19 - DC 30.
6 - SC 20 mph

Most of the 70 mph deaths look to be on trunk roads, but it's hard to tell, and that doesn't factor in non-70 mph trunk road. A vague estmiate for the fatality rate of trunk roads:
525 fatalities per billion vehicle miles, with a lot of uncertainty. So that's less than 2 million vehicle miles per fatality.

As an aside, there are 261 total injuries on 70 mph A roads, with another 29 on non-A road 70s.

Perhaps the most interesting there is on the 23rd December 2016, anticlockwise on the M25, just after the A3 off slip. 1st vehicle is the cyclist, I believe that's "at fault". Then two cars were involved. Apparently the cyclist might have hit a telgraph pole, the two cars rear ended each other...