在官方讨论串当中
除了上面的文章之外，官方有再补充几个讯息
1.
Tram bridges and tunnels, I forgot to mention those! Yes, the tracks work
with the same basic logic as roads, so you can elevated them or dig tunnels.
电车轨道一样可以搭桥和挖隧道，建造的逻辑跟一般道路一样
可以抬升或潜遁
2.
Trams are mechanically closer to buses, but have the added benefit of being
able to avoid roads with the standalone tracks. They are best for short inner
city lines, as the average speed of a tram is very low compared to a metro.
Metros are meant for longer distances and building tiny little metro lines
would cost an insane amount, so trams are the thing you want to use when you
need a public transport type that can be free of roads but work for small
areas.
关于电车和地铁的不同，官方的回答是
地铁使用在较长的距离，轨道的面积也较小，但也比较花钱
电车则是使用在小区域当中，同时不用太特地改变原有的道路规划