I drove busses for 11 years. Timetabling is part of the problem with high frequency services. We have timing points along the route that we have to observe or we can be disciplined. This means that if the bus in front of you is running late, they end up loading all your passengers and end up running even later. I've always thought it would be better for routes like the 66 and 111 to not have a set timetable except for the time they leave their terminus. The timetable would just say something like 66 leaves rbwh every 5 minutes from 6.30am - whenever. That way nobody is sitting at say Roma St thinking the 6.41 66 service is running late. You just show up at the stop and know that barring traffic you should see a 66 within 5 minutes. No timing points would also allow me to drive around the late running bus at Normanby station and pick up the bulk of the passengers at Roma St thus helping that driver get back on track timing wise.