Bulding highway and monorail in stacked city is so annoying and buggy, that's why i always start a city by building 2 highways crossing the whole terrain in a + shape When the city is finally big enough to need a larger traffic flow i connect the highways to avenues. Avenues are less buggy Also a hint if you wanna play those vehicle missions with a train: in rail intersections as in 8:36 always build a cross in a + format and then connect all 4 tips one into another (it will look like a goth cross), that will work like a train roundabout so you can turn back if needed Do that even in the 8:36 case where the north tip of the "goth cross" would be useless, the roundabout will work anyway
I wasn't originally planning on putting any highways into my city, or any of my cities. In fact I usually avoid highways. There was a subscriber comment pointing out that I was avoiding highways, so I starting building highways to make things interesting. I think I'll make a video trying your setup. but even though it was a headache introducing highways into an already developed city, it was also really interesting figuring it out. Deciding what to demolish, and what to work around.
