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.
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.
Great point about Mariner’s bridge comment. One of my fav LDS moments.