Total trip time: only 4 minutes (though Skinny City is 26km long instead of 170km).
Line City is also supposed to have a high-speed train that takes passengers from one end of the city to the other in 20 minutes. That kept out most of the cars, except the endless parade of donut and hotdog trucks, so I didn't really major traffic jams. As you can see, I went with trams for local transportation-Line City is a zero-car environment-so I drew my road with two-way tram lines and used a mod that let me add a tram turnabout just so they don't have to go all the way from one end of the city to the other just to change direction.
