Panzer Str. N - help with road sign photo

[photo-war]

Hello! Please help with this photo of road signs, any guess what is Pz.Str.N here? I am sure that N is for NACHSCHUB but what is STR???

Note that there are two similar Pz.Str.N road signs pointed in opposite directions!

Thanks in advance,
Alexander

[Gran Sasso]

Strasse, road

N is imo just the number of the road, could stand for Nord, north.

[photo-war]

Strasse, road

N is imo just the number of the road, could stand for Nord, north.

Thanks Gran Sasso! My first thought was that Str. Stand for Strasse here, but what is Panzer Strasse? Is this road that ok for tanks movement? I just have never heard such definition before…

[Remy Spezzano]

Pz. Str. N is Panzer Strassennetz (Tank Road Network or Road System)

Zur Pz. Str. N is Zur Panzer Strassennetz (to the Tank Road Network)