Accidents between cyclists and heavy vehicles turning right: conflict and behavioral studies in intersections in central Stockholm

Karin Hassner
Karin Brundell-Freij
Sofia Eriksson

This study aimed to find ways to decrease the risk for severe accidents between cyclists and heavy vehicles turning right. The primary question was whether the so called “Dutch” intersection design (with a protecting curb) could decrease the risks. Other questions were if there are other/better methods/designs and if there will be new serious risks with the Dutch design. The result from this study is that the Dutch design doesn't protect from accidents between cars turning right and cyclist. The reason for this is that these accidents mainly involve cyclists going straight. The best designs are where right turning cars have red signal while cyclists going straight have green signal. Other good solutions are bicycle lane together with bicycle box or set-back stop line for the cars. Bicycle tracks should transform into lanes when approaching an intersection. The study not only found that the Dutch design is a poor design to protect from car/bicycle accidents; it also brings new risks for accidents between cyclists and pedestrians.

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