Removing traffic engineering control: the awkward truth?

摘要

With data from only three trial sites where the effects of removing traffic control regulations, in these cases signal control, have been monitored (despite the significant level of scrutiny), it is not really possible to provide proof, or otherwise, of the Buchanan/Cassini hypothesis. It is clear that further research at a much greater number of junctions and network arrangements and over a longer period of time will be required before any satisfactory conclusions can be drawn. The trials have not been in operation for long enough to understand impact on road safety, and the issue of appropriate crossing facilities for vulnerable road users needs to be addressed rationally.