gangkulvert

17:09 May 18, 2015 

There is no bridge. Språkrådets ordboka defines Kulvert as:
kulvert m1 (fra eng.) underjordisk rør, tunnel for vann, ledninger eller transport mellom bygninger.
As Sean says, using 'culvert' is too much of a direct translation, as well has having overtones of service or water channels.

13:54 May 18, 2015 

Despite the lack of context, I would always consider a gangkulvert to be something through which pedestrians pass through i.e. under.

12:48 May 18, 2015 

are the pedestrians going to walk under the bridge or over the bridge?

12:23 May 18, 2015 

I would translate it as pedestrian underpass, combing tihomir and zebing's responses. Though there is nothing wrong with "pedestrian culvert", it comes across a bit too much as a direct translation for my liking. I have never heard of an underpass being referred to as a subway, but then I've only worked in Ireland and Norway.
So I would translate the sentences as "Applies to Seut pedestrian underpass roof slab".