In the 1950s, British Railways found that the cost of manning some 2,400 level crossings had risen past £1 million per annum, with some locations seeing a tenfold increase. In the postwar labour market it was often difficult to recruit crossing keepers, the job itself being a responsible but rather dull occupation. In addition, manually operated crossings often caused long delays to road traffic because of the need to close the gates and clear the distant signal before the approaching train reached it.