Organisation: TRL
Date uploaded: 30th May 2013
Date published/launched: December 2009
This study investigated two hypotheses about typical driving behaviours.
(1) The majority of motorists engage in behaviours that could be considered unsafe, on a daily basis.
(2) That these unsafe behaviours may be, at least partly, due to social pressure, e.g., strict compliance to the Highway Code is avoided in the belief that this may provoke frustration on behalf of other road users.
Following an initial focus group discussion to establish typical unsafe behaviours, an observational on-road study was conducted in which 30 drivers were asked to complete 30-40 minute routes on public roads driving 1) normally and 2) strictly compliant with the Highway Code.
Results showed that in the normal drive, more than 80% of the participants exceeded the speed limit, failed to check mirrors and blind spots, and left an insufficient gap distance (“tailgating”).
In the compliant drive, there was a greater than fourfold increase in the incidence of tailgating on behalf of other road users when compared to the normal drive.
These findings provide support for the contention that the majority of motorists engage in unsafe driving behaviour on a daily basis, and that the high prevalence of unsafe driving behaviour may, at least partly, be the result of social pressure. That is, individuals may engage in unsafe driving behaviour (e.g. speeding) in the belief that this may prevent frustration on behalf of other road users.
Footnote
Please note that this report is largely an analysis of the flow performance, and therefore doesn’t cover in detail:
• The safety impacts including the interaction of fully autonomous, semi-autonomous and fully manual vehicles
• How the availability of autonomous vehicles – owned or per-trip e.g. as taxis – will change demand and use and the knock on effect on safety urban and rural roads.
For more information contact:
Cyriel Diels
T: +44 (0)1344 770685