Variable speed limits have safety benefits and a homogenizing effect, but a German study found no increase in freeway capacity. Benefits The analysis recorded bottleneck flow reductions that were balanced across all lanes in the case of an active VSL system. In case of an inactive VSL system the flow reductions were slightly… Content type Benefit Date Posted 10/28/2016 Taxonomy (ARC-IT) Variable Speed Limits (TM20) Geolocation links Munich, Germany