RedPanels

then my original argument stands, and it remains highly likely that road owners would impose unreasonable tolls

Perhaps they would, but it's not a certainty. It's entirely possible for many entities to own different roads and compete on price

...same place, leaving little to no room for competition.

have you never driven a car before? There are frequently many routes of varying length to the same destination.

and, of course, there would be exactly zero opportunity for competition in the case of highways.

Is there some law of physics that prevents multiple highways to run alongside each other?

it would be extremely impractical...and considering highways intersect with cities, etc. impossible in most cases

you realize that, in a place as dense as a city, there is almost always a non-highway option to get somewhere, right?