1,721,181 research outputs found
Aspects of the Solent study and its projected analysis
No full textPaper presented at the Conference on the Value of Time in 1970
Accidents at four-arm single carriageway urban traffic signals
No full textThis report describes a study of personal injury traffic accidents occurring during the four years, 1979 - 1982, at a sample of 177 four-arm single carriageway traffic signal junctions on 30 mile/h roads in urban areas of Great Britain. The sample was structured to compare junctions which were (i) operating under UTC or not, (ii) had a pedestrian stage or not and (iii) had two vehicle stages or more than two. Tabulations are given showing accident frequencies, severities and rates by junction category, and of accidents by type, road-user involvement and other characteristics. Generalised linear modelling methods were used to relate accident frequencies by type to functions of the traffic and pedestrian flows and the geometric and control characteristics of the junctions to provide models for examining the effects of such features.<br/
Review of the Contributory Factors System
No full textAlthough it ceased to be a national requirement nearly 50 years earlier, in 1994 many UK Police Forces were still collecting information about the factors which may have contributed to the occurrence of a road traffic accident, the use of which, in conjunction with the more objective STATS19 data, can make a vital contribution to road safety improvement. With the aim of harmonising the quite divergent systems then in use, a new system for recording these contributory factors was devised and tested by the Transport Research Laboratory (TRL) in 1995. However, the use of this system proceeded on a voluntary basis after many objections were raised by police and road safety practitioners. Eighteen police forces have since adopted the TRL devised system. During this review, interviews were carried out to assess current working practices and problems associated with the new and other systems.This report summarises the findings from these interviews, together with a review of other systems in use, and offers possible solutions to overcome the problems identified. A revised system is recommended which retains many of the innovative ideas from the TRL designed form, thus allowing a degree of continuity for those police forces who have already adopted the system. It also overcomes many of the original objections raised, thus enabling nationwide implementation
Accidents at 4-Arm roundabouts
No full textGives the findings of a study of personal injury accidents at a sample of 84 four-arm roundabouts on main roads in the UK. The study included small roundabouts and roundabouts of conventional design, in both 30-40 and 50-70 mile/h speed limit zones
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