The first shows the prevalence of crashes on the British Strategic Road network where ‘driver fatigue’ is one of the recorded contributory factors. There are some interesting trends to note here with motorways passing through more rural areas often showing up as having the highest percentage of fatigue crashes.
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The second shows HGV collision involvement on the strategic road network by traffic flow. Traffic flow is a very good way of measuring risk and comparing it between different roads and having this on a vehicle class basis is very useful in this instance.