(13 Aug 2020, 9:45 pm)streetdeckfan wrote For routes like the 56 and Cobalts, the B9s are definitely overkill, but I suppose that's what gives them their reliability. The downside is they use nigh on twice as much fuel as a StreetDeck (allegedly, I doubt we'd ever see the real world figures)Agreed 6 cylinder would be best suited to X21/X84/85 and possibly X9/X10....although cant see coaches going anywhere soon. Also maybe the 20 should it ever be upgraded to DD
The fact that the 56 B9s won't be receiving a full refurb, at least to the extent of the Cobalt B9s, suggests they had plans to upgrade at some point in the not too distant future.
The 4 cylinder StreetDecks would definitely be more than enough for both routes IMO, the 6 cylinder would definitely be overkill.
RE: New StreetDecks & ADL Enviro400s - X-lines fleet changes