As a serious response, they still exist. Picard walked down a lane in "Family" until he ran into his nephew. And we see people walk around the street where Sisko's is
They show the Golden Gate Bridge with solar panels on it.
Maybe the highways/interstates are the same.
I forgot about that
whatever it is, it was a long road
This is like an even worser version of THE GAME
Dammit, I saw the single comment and I knew someone had beaten me to it.
His time was finally here
Most likely the city roads just become pedestrian walk ways and they demolish interstates and Highways to make room for more greenhouse spaces.
The only story we have set in the 20th or 21th century are “Return to Tomorrow”, “Future’s End”, “Future’s End, Part II”, “Carpenter Street”, “Tomorrow and Tomorrow and Tomorrow”, PIC season 2, and First Contact. If there are more, they escape me. These stories are all set on Earth. My best assumption would be that after the 21st century is when automobiles got phased out of society. There isn’t really a good reason to show roads when cars aren’t a necessity for travel.
However for whatever reason, as Mariner points out, we still have bridges.
