Ответ:
1. The New York subway is easy to use and quite cheap. ( because there are traffic jams on the NY's roads. )
2. Taxi in NY is bright yellow and carry large TAXI signs.
3. Taxis can't go outside the city. ( but they will go to the airports)
4. The nearly all the east-west streets and most of north-south streets are one way only - this is problem for the visitor who comes for the first time.
5. Yes, they are. New York buses are also easy to use.