The Humber Gap is a term for the geographic gap between the roughly north–south running line of hills formed by the Yorkshire Wolds and the Lincolnshire Wolds, formed by the west–east running Humber Estuary.
[1] In the geological past the gap has formed part of an ice barrier due to glaciers during the ice age resulting in damming and formation of a 'Humber Lake',[2][3] and also forms a geological division.
[4] In modern times the gap has formed a natural choice for transport routes, such as the railways.
[5] The Humber Bridge also crosses the Humber close to the gap.
[1]