siirtelys
Siirtelys are a type of slip road or on-ramp in a single-carriageway road network, typically found in Finland and other parts of the world where freight and passenger traffic is transported over long distances by rail and road. These intersections are designed to facilitate the safe and efficient transfer of traffic between lanes.
The primary purpose of a Siirtelys is to guide slow-moving traffic, including trucks, buses, and emergency vehicles,
A Siirtelys typically consists of three components: an approach lane where slower traffic moves, a merge lane
The effectiveness of Siirtelys has been studied in various research projects, which have shown that they can