Stuart was taking Dad and his partner, Ella on a drive-by sightseeing trip of York city centre. Ella was obviously impressed with the old buildings, nice architecture and pleasant looking people. Dad however seemed pre-occupied by his memories of the road layout in York and apparently it's extensive one-way system.
As we passed through a set of traffic lights and drove along a road we all noticed that all the cars on the other side of the road were queuing. "Is this a one-way street then Stuart?" Dad asked. Yes Dad - of course it is. That's why we are going in this direction and all those cars are waiting to go in the opposite direction!