The A98 motorway in the Baden-Württemberg region runs from east to west near the southern border of Germany formed by the Rhine river. On the route there is a 480 meters long tunnel. The northern tube has been designed as two-lane and the southern as three-lane. New Austrian Tunnelling Method was used for the excavation from the east. On the western portal the excavation by concrete roof slab method was applied due to the occurrence of eroded sedimentary rocks. Almost 19-meter long cross-passage in the middle of the tunnel was constructed and it was also used to transport the excavated material. This accelerated the creation of the final lining. Concreting proceeded from the eastern portal of the northern tube and then it continued in the southern tube in the opposite direction. The project included earthworks, securement of portals and installation of tunnel equipment.

The project was awarded the Prize as Transport Construction of the Year 2021 realized abroad in the Czech Transport Construction, Technology, Innovation competition.