You must respect the red lights, the speed limits and stop at the end of each station.
Improve your score by embarking as many passengers as you can and arriving at the next station on time.
You can select local trains and then stop at each station or express trains and stop at main stations only.
Use disrupted traffic mode to see unexpected events!
Online free demo version playable with a mouse on a computer at http://new-york-subway-driver.appspot.com/