Highway Gothic  Suggested by koeiekat 
Overpass  Suggested by max20115 
Lorimer No 2 SemiBold  Suggested by clarecollins.nc 

Any of these will do.
Roadgeek 2005 Series C.
Traffic 02 (here on dafont}.
Highway Gothic Narrow (here on dafont}.
Road Sign D (you don't want this one because of the badly made S).

The Roadgeek is the best match but it is a photo-finish with the Traffic 02 and Highway Gothic.Narrow.

Is Overpass

That, Max, is a pretty dumb remark. Get your glasses and look again.

better not comment please

Better not make ridiculous suggestions.

It's $30, but the most accurate resemblance I could find.