It is perfec.We have buses,undergroud and taxies.They are all at your service for 24 hours,and they are everywhere.Wherever you are,you can take a bus,undergroud or a taxi.
I don't think it's perfect,because it always have some problems. 或者是 I feel really good about the transportation system in my city.I think it's perfect. 回答的话就任选一个喽~