(09 May 2018, 6:49 pm)Jamie M You're missing an important detail that the X21 route is about 10 miles longer than the 309. That's a lot of extra BSOG payment over a day since it's done by Kilometre. It wouldn't change reliability since you're just shifting vehicles around similar work. The spare bus situation wouldn't also work in reality, since you would have to replace the current spare deckers with other spare deckers.
(09 May 2018, 6:49 pm)Jamie M You're missing an important detail that the X21 route is about 10 miles longer than the 309. That's a lot of extra BSOG payment over a day since it's done by Kilometre. It wouldn't change reliability since you're just shifting vehicles around similar work. The spare bus situation wouldn't also work in reality, since you would have to replace the current spare deckers with other spare deckers.