down and a marche table like those used on railways was drawn up. Columns of lorries then entered the section according to a timetable, with their progress signalled ahead. Sidings were provided for relief lorries to pick up the loads of any lorries which broke down, and breakdown gangs were kept available to clear the road. Lorries were never unloaded on the main road but were diverted off it; to save time waiting for horse-drawn wagons to collect it, they discharged their loads into dumps for later collection.
