[Thanks, Bike to the Future for tweeting about the following report.]

Infrastructure and Cyclist Safety (2011)

The Department for Transport commissioned TRL to conduct a literature review to consider the role of infrastructure in relation to the safety of cyclists and their interaction with other road users...

Of all interventions to increase cycle safety, the greatest benefits come from reducing motor vehicle speeds. Interventions that achieve this are also likely to result in casualty reductions for all classes of road user. This may be achieved by a variety of methods, including physical traffic calming; urban design that changes the appearance and pedestrian use of a street; and, possibly, the wider use of 20 mph speed limits.

Read more: http://assets.dft.gov.uk/publications/infrastructure-and-cyclist-safety/infrastructure-and-cyclist-safety.pdf