dnx wrote:sorry if i have post in a wrong way and im not good at english
1. the bus(any traffic) reliability going down, to change a new bus, is there any efficient way than buy>set route>delete old one (if for a lot of buses)
2. in a setting route screen, what is the different about --local-- and --express--
thanks for reply

I don't know about the first one, but your second question is easy:
Its for trains/trams that drive on a track, where you can have multiple station and a train passes them all while going from A to B, let me explain it:
ABCD indicates a station, - is a track
A--B--C--D, If you didn't change to express and you ordered the train to go from A to D it will stop at every station, thus: stops at A, B, C and D.
If you set it to express and you ordered the train to go from A to D, it will just pass by station C and D without stopping.
I hope you are able to get something out of my post, my english sucks too.