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B 14 - Bypass Heslach

The B 14 - Heslach Bypass serves to relieve the Stuttgart district of Heslach from through traffic on the B 14 federal highway. The core of this measure is the 2.3 km long Heslach Tunnel between Südheimer Platz and Marienplatz. There is an underground intersection roughly at the tunnel centre. Every day, up to 45,000 vehicles use the Heslach Tunnel, which has one lane in each direction. In order to secure the excavated cross-section, shotcreting was applied, with the help of which the outer shell was created. Before the inner shell was installed, the tunnel was provided with a plastic membrane seal. At Marienplatz, a three-lane tunnel cross-section was driven under tricky geological conditions, which runs only 12 m beneath residential buildings. In order to protect the houses, far-reaching measures were undertaken before tunnelling got underway. The tunnel is furnished with a whole series of operational and safety-technical facilities designed to make operations easier and serve the safety of tunnel users. All technical systems are automatically operated and monitored via an electronic control system. Reports run together in the central control room. The most important reports are passed on to the fire service, the police and the office for foundation engineering.


  • Country: Germany
  • Region: Baden-Württemberg
  • Tunnel utilization: Traffic
  • Type of utilization: Road tunnel
  • Client: Landeshauptstadt Stuftgart
  • Main construction method: Trenchless
  • Type of excavation: Drill-and-blast
  • No. of tubes: 1
  • Tunnel total length: 2.3 km
  • Cross-section: 96 m² -246 m²
  • Contract Volume: 275 mill. DM
  • Construction start/end: June 1984 till April1991
  • Opening: May 1991