Manual for Streets, Evidence and Research

The Transport Research Laboratory s (TRL) report Manual for Streets Evidence and Research (York et al, 2007) contains information on the effects of road and junction layouts on speed and road safety. However, the sites chosen for the study were aU in housing estates with average speeds under 25 mph and traffic flows up to about 1000 vehicles per day. Indeed, one site was eliminated from the study because it was significantly different from other sites, and the report states that The site had to be excluded from the analysis and therefore other exceptions could exist. Should a Road Safety Auditor rely on research in this report when looking at a design likely to be outside these speed and flow limits ... 

York I, Bradbury A, Reid S, Ewings T and Paradise R (2007) Manual for Streets Evidence and Research. Transport Research Laboratory, Crowthome. Report TRL661. 

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