Whilst I have every sympathy for Miss Marple's case for making Dan Bank safer, for all road users, I do not think that any form of traffic calming should be installed. I have travelled up and down Dan Bank for the past thirty five years and seen very few accidents. The VAST majority of drivers using Dan Bank do so responsibly. It is the irresponsible ones who drive without due care that are involved in accidents. The rest of us just get frustrated at the queues into and out of Marple and would hate to see things made worse.
To improve the safety of children crossing the road a crossing with lights could be installed. The children can then press the button just for fun, and wander across the road some yards (or metres) away from the proper crossing to 'look cool'.
Victor M's admission that he weaves in and out of the traffic only confirms my opinion of cyclists. The provision of cycle track, which would probably be part of an widened pavement would put the pedestrians at risk from inconsiderate cyclists.
In any case, the pot holes have a traffic calming effect !