Utvärdering av en hastighetsreducerande anordning i vägbanan i samband med vägarbete på Essingeleden.

For the purpose of improving security at road-work by making the drivers pass the construction site at a low speed a sort of rumble strips were tested, which were placed across the roadway at two different distances before the construction-site. When the rumble strips were installed the speed decreased so heavily that congestion occurred.