[gk1]

> "... a system where you purchase ticket receipts from machines off the busses and can enter through both front and back doors."

For anyone curious, the point is that this greatly reduces the time spent at each stop. On regular buses, passengers must enter through one door and, one by one, make their payment (with either a Metrocard or cash).

[keithpeter]

Bus passes? In most UK cities you can buy a photo-id pass for a week or a month and just get on. Most regular users have them.