[muawiyah]

Federal authority to be involved in roads (including funding them) is in the Constitution. They don't have to pay for them of course.

Railroads are also a form of "road" ~ neatly divided into "bed", "rails", "rolling stock".

[Political Junkie Too]

I guess so. Trains weren’t invented until the early 1800’s, although I did read that horse-drawn wagons on rails existed a lot earlier.
-PJ