In October 1956, senior members of Her Majesty's Railway Inspectorate (HMRI) embarked on a fact-finding trip to the Netherlands, Belgium and France, to investigate the practice of automating level crossings. Their subsequent report recommended the introduction of automatically operated crossings with half-barriers, known as AHBs. This was projected to give considerable cost savings through the withdrawal of crossing keepers and would also speed up the flow of road traffic; the crossing being closed for less than a minute as opposed to 3 or 4 minutes at manned crossings.