Capacity Issues in Sweden - Applications and Research

Publisher's full text
Torsten Bergh
Karin Nordqvist
Per Strömgren
Fredrik Davidsson
Karl Lennart Bång
Arne Carlsson

This paper gives an overview of the Swedish trunk road system and present objectives, guidelines concerning capacity and level of service procedures to assess these issues in the feasibility and design procedure are also described.

An important goal in Sweden is investments and speed limit changes over a 10 year time scale to decrease the C02-exposure. The long term speed limit overview with the objective to require median barriers at speed limits over 80 kph with results so far is presented. By now over 50 % of the former traffic load over 80 kph is decreased to 80 kph. Some 2,700 km have been retrofitted to 2+1 median barrier roads with speed limit mainly 100 kph.

An overview is also given of the updated Swedish Highway Capacity Manual with new chapters especially on jam densities, entry lanes, weaving areas and traffic signals. Some interesting research projects are also briefly covered. These are 2+1 median barrier roads, capacities at motorway work zones, speed harmonisation with variable speed limits on motorways to increase capacity, ramp metering and Drive Me (autonomous driving full scale tests).

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