(28 Oct 2015, 5:39 am)nk55 wrote The X30/X31 can be allocated omnidekkas, but the low bridge at Dunston gives very little clearance, tridents, presisents & olympians are too big for that route.
Just as services 8/78 and 45/46 have a preferred alternative vehicle type which is the same specification, I am led to believe that the services which underwent changes last weekend are also subject to preferred alternative vehicle types which are of the same vehicle type and specification.
The preferred alternative vehicle type to substitute a branded vehicle on services X30/X31 is a red single decker (the first point of call should be to allocate 5254 which is the red OmniCity based at Stanley).
Services 6 and X70/X71 have a preferred alternative vehicle type as double deck. Any will do, but the two spare OmniDekkas should be used as the first point of call.
So whilst double decks can be allocated to services X30/X31, they should only be allocated if there are no single decks left.