It’s a common myth that the bulk of head on crashes occur because of inappropriate overtaking manoeuvres. This isn’t true. Across Australia and New Zealand (and across the world in fact), the overwhelming majority of head on crashes are ‘non-overtaking’. They occur due to drivers drifting out of their lane, either to the right and into the opposing lane, or to the left where they overcorrect and then enter the opposing lane.
While educating drivers may help a little, the most effective treatment for head on crash risk reduction is a central flexible barrier system to separate streams of traffic. That’s the Primary Safe System Solution.