The prominent "S" logo on the bridge is the classic symbol for the S-Bahn in Germany. The graffiti and the construction style of the steel bridge suggest a major urban center. The text on the construction hoarding is in German. I am fairly certain this is in Berlin, likely near a major S-Bahn station.

I suspect this is Berlin, Germany. I am 70% sure.

then: forward

The posters on the wall clearly mention "Hamburg" and "Dockville," which strongly points to Hamburg rather than Berlin. The distinctive green steel bridge structure is characteristic of the Hamburg S-Bahn lines, specifically near the Sternschanze area. The construction barriers and urban environment are consistent with the busy, graffiti-covered underpasses found in that district. I am now very confident this is in Hamburg.

I suspect this is Hamburg, Germany. I am 95% sure.

then: guess