Designing the 3D zone of direct impact of the Stockholm bypass

The E4 motorway, i.e. the Stockholm bypass (Förbifart Stockholm), goes through the capital city of Sweden. Its’ task is to connect the southern and the northern parts of the city, reducing the heavy traffic inside the city. The main task realised by Sweco Engineering is the development of the 3D model of the direct impact zone, based on the precise guidelines. It regards all segments in which the investment leads through a tunnel, as well as the switchboards leading to the tunnels.

Project description

„The AutoCAD Civil 3D program is used to create the model, whereas the data needed to create the model comes from different CAD programs, which is a challenge that must be overcome on a regular and current basis. The model is constantly updated due to the numerous changes coming from the analyses conducted by the investor” says Krzysztof Psujek, CAD Specialist in Sweco Engineering.

Photograph of the 3D model (southern part) / Sweco Engineering materials

Photograph of the 3D model (southern part) / Sweco Engineering materials

The course of the bypass has been the subject of much research over the past decades. Being led by the rule of the sustainable development and the minimalisation of the negative impact of the road on the natural environment it was decided that the most of the road (over 18 of 21 kilometers) will lead through tunnels.

At present, the works linked with developing the project documentation are being carried out. The plan of buying grounds for the investment has been accepted and approved by the Swedish Government.

In accordance with the accepted time schedule the start of the first construction works will take place this year. The anticipated timeframe of the contract is 10 years. It is estimated that by 2035 approximately 140,000 vehicles a day will be using the Stockholm bypass.

The most important information regarding the planned route:

  • Lenght: 21 kilometers
  • Lenght of the tunnels: 18 kilometers
  • Section of three lanes in every direction, in two separate tunnels 
  • Maximum speed: 80/100 km/h
  • Anticipated traffic: 140,000 vehicles a day (in 2035)
  • Estimated cost of construction: 3.1 billion Euro (approximately in 2009)

The investment is co-funded by the European Union as a part of the Trans-European Transport Network (TEN-T)