from Wikipedia, the free encyclopedia
Sign 590-10 StVO : Block bypass

In traffic engineering, the block bypass describes a special routing of left-turning vehicle flows . It is used when limited space in the street prevents the creation of a left-turn lane at an intersection or junction or the flow of traffic on heavily traveled road sections with a green wavenot to hinder. In this case, turning left at the point is prohibited and a block bypass is established. The vehicles are led to the right and then led around the next block by turning left twice. This traffic regulation is set up especially when there are not many left-turns and the traffic routing through a side street is reasonable.

If two opposite left-turners are led over a block bypass, their traffic light phase does not apply . Bypassing the secondary directions can be used to increase the performance of the main direction.

In local public transport , a block bypass can also mean a large-scale turning option for vehicles ( tram , trolleybus or omnibus ) in the form of a so-called “block loop ”.


  • Henning Natzschka: Road construction - design and construction technology. BG Teubner Verlag, 2003, ISBN 3-519-15256-8 , pp. 229/230.

See also