New York has older bridge designs made of loud steel. Concrete is much quieter and what modern elevated rail systems use.
Monorail might be slightly better for all elevated rail, but it is much worse underground and cannot run on the ground at all. Since both of those are useful at times you should buuld a regular two track train. Plus monorail is not standard so if you build one it will come down in 20-30 years when you can’t fix something anymore. Meanwhile regular trains have been running more than 100 years.
![Monorail [OC]](https://lemmy.world/pictrs/image/b440987a-2f84-4863-8430-711f15f55604.jpeg){kind=link}
New York has older bridge designs made of loud steel. Concrete is much quieter and what modern elevated rail systems use.
Monorail might be slightly better for all elevated rail, but it is much worse underground and cannot run on the ground at all. Since both of those are useful at times you should buuld a regular two track train. Plus monorail is not standard so if you build one it will come down in 20-30 years when you can’t fix something anymore. Meanwhile regular trains have been running more than 100 years.