Neat idea for Street Car Rails & Where are these from?

[Super]

Here is a neat idea for street car Tomy tracks where they have brick paper in between the rails.  And where are these 1/8 length, gray curved rails? Where would they have come from? They even have ties embossed on them? I don't recall ever seeing 1/8 curves in any color let alone ones with built in ties before. Anyone else or am I seeing these all wrong or just having another forgetful senior moment?

https://www.youtube.com/watch?v=cjIxQ1eP69U