The road markings and the blue highway signs with white text are characteristic of European road infrastructure. The red brick retaining wall and the overall design of the tunnel entrance suggest a location in Germany or a neighboring country. The signage style and the general appearance of the environment point towards a suburban or urban highway tunnel in Germany. I am moderately sure this is in Germany.

then: forward

The blue highway signs with white text and the specific font confirm this is Germany. The red brick tunnel entrance is a distinct architectural feature often found in urban infrastructure projects. The road markings and the overall layout are typical of German highway exits or tunnels. I am quite confident this is in Germany, likely in a major city like Hamburg or Berlin.

then: guess