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The 3.6 km long Kramer Tunnel will be the longest two-way tunnel in Germany. It is primarily meant to relieve through traffic in downtown Garmisch-Partenkirchen and towards Grainau/Eibsee and the federal border at Griesen. In 2020, the Staatliche Bauamt Weilheim contracted ILF Consulting Engineers to carry out the following design phases: 5 to 9 (among others, preparation of tender documents, contract awarding and site supervision) for the installation of the operation and safety equipment.

The Kramer tunnel will predominantly be constructed as a mined tunnel. Furthermore, the tunnel will have two operations buildings outside and a cavern inside the tunnel with a 26 m high exhaust air chimney. The tunnel is planned with cross passages accessible to pedestrians and vehicles as escape routes. More than 1,300 LED lights will ensure that necessary lighting is provided in the Kramer Tunnel. 16 jet fans (55 kW each), and 2 exhaust air fans (420 kW each) ensure that the required ventilation concept is implemented.

Since 2017 ILF has been successfully involved in the Kramer tunnel project, carrying out tunnelling and road design services, preparation of tender documents and risk analysis as well as the first three design phases for the operation and safety equipment.