In the 1960's, Bradford City Transport used to have bus routes which showed different numbers depending on the direction they were travelling in. For example
75 Fagley - City Centre - Moore Avenue
81 Moore Avenue - City Centre - Fagley
75 Wrose - City Centre - Moore Avenue
76 Moore Avenue - City Centre - Wrose
There were also some workings which were unadvertised in the timetable, viz.
76 Fagley - City Centre - Wrose
81 Wrose - City Centre - Fagley
These were not circulars but cross-city routes travelling east, north and south-west.
A similar policy applied to cross-city buses between Greengates (67), Thorpe Edge (65), Ravenscliffe Avenue (68) (north of the city) and Haworth Road via Smith Lane (69), Haworth Road via Toller Lane (70), Sandy Lane (71) (to the west). When BCT tried to replace these with the bidirectional numbers 29, 32 and 33 passengers got very confused. West-bound passsnegers were told the new numbers reflected where the bus had come from, not where it was going to!
The City Circle was also 1 anti-clockwise and 2 clockwise.
In Hull the EYMS 29/29A/29B circular to Cottingham was numbered 92/92A/92B in the opposite direction.