Korsningsutformning: en kunskapsöversikt
2006 (Swedish)Report (Other academic)Alternative title
Junction design - a review (English)
By commission of the Swedish Road Administration, VTI has carried out a study of the literature in order to bring up to date the knowledge concerning the design of road junctions from the standpoint of traffic safety. Mainly junctions of less advanced design and roundabouts have been studied. The measure that has predominated in recent years is to convert junctions into roundabouts. Many studies point out that this is a cost effective measure which reduces both accident risk, injury risk and accident cost. For pedestrians, roundabouts appear to be as safe as other types of junctions, while for cyclists the safety may be either as good as, or worse. It is also shown that reduction of speed has a positive effect on both crash and injury risk. As regards turning lanes, several of the studies confirm earlier results that a left-turn lane is a measure that enhances traffic safety in junctions. New results also points at that even right-turn lanes can reduce both the total number of accidents and the number of injury accidents. Several studies indicate that the angle between the primary and secondary road should be as near 90° as possible, the data in this respect are however contradictory. It is further confirmed that two staggered three-way junctions are preferable to one four-way junction.
Place, publisher, year, edition, pages
Linköping: VTI., VTI rapport 554 , 2006. , 39 p.
Junction, Layout, Roundabout, Accident rate, Risk, Injury, Cost, Pedestrian, Cyclist, Speed, Reduction
Research subject Road: Traffic safety and accidents, Road: Junctions and traffic safety; Road: Traffic safety and accidents, Road: Accident risk
IdentifiersURN: urn:nbn:se:vti:diva-6413OAI: oai:DiVA.org:vti-6413DiVA: diva2:675290