Arlinger Tunnel

Underground Mining Traffic tunnel construction

Two-lane road tunnel

Project data

Regional Council of Karlsruhe, Germany
Order sum
42,0 Mio EUR (in ARGE)
Period of implementation
June 2019 - December 2022

Sekretariat Untertagebau
+43 5556 7181-817

In order to relieve traffic in the centre of Pforzheim, the plan is to build a western bypass around Pforzheim with reconstruction of the B 463 federal road. The Arlinger Tunnel is part of the first construction phase and is to be built as a two-lane, 1,347.9-m-long oncoming traffic tunnel (including two breakdown bays), which will be predominantly enclosed.

To the east of the above, a 1077.3-m rescue tunnel is to be built which will be connected to the main tube by four cross-cuts including widenings.

Furthermore, the contract includes the construction of the central operations centre which will be located in the vicinity of breakdown bay 2 and consist of the following structures:

- Ventilation tunnels

- Electrical cabling tunnels

- Connection tunnels

- Cross-Cut, and

- Exhaust air shaft


The excavation will involve both digging machines and explosives:

- Excavation cross-section for main tunnel = approx. 133 m² x 1,220 m =162,260 m³

- Excavation cross-section for rescue tunnel = approx. 18 m² x 1,023 m =18,414 m³

- + cross-cuts, breakdown bays and operations centre = approx. 21,000 m³


Construction began in June 2019 and will be completed in January 2023.

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