1. Time limit (working days only): morning peak: 7: 00-9: 00, evening peak: 17: 00- 19: 30, totally 4.5 hours per day.
2. Tail numbers): Monday tail numbers 1 and 6, Tuesday tail numbers 2 and 7, Wednesday tail numbers 3 and 8, Thursday tail numbers 4 and 9, and Friday tail numbers 5 and 0.