They’re around, but probably some shared network instead of what they are today. Car traffic is vanishingly low, since the only people who have a car are enthusiasts, and most would just take shuttle, or transport.
At the very least, I can’t see the Federation removing them completely, if only for the historical/cultural value that they have. Ancient humans in the 21st century used to drive and walk on them, you know.
They’re around, but probably some shared network instead of what they are today. Car traffic is vanishingly low, since the only people who have a car are enthusiasts, and most would just take shuttle, or transport.
At the very least, I can’t see the Federation removing them completely, if only for the historical/cultural value that they have. Ancient humans in the 21st century used to drive and walk on them, you know.