Much of the present-day Merseyside alignment is unchanged over the last century, with the route through Liverpool to Switch Island junction in Aintree utilising existing road infastructure from the Victorian era, such as Scotland Road.
The present day alignment between Switch Island junction and Aughton, Lancashire via Maghull was non-existent prior to the 20th century, with the connecting roads being typically smaller lanes which still exist today.
At the top of the hill, the road crosses into the Harrogate district, at which points there is a long narrow descent to Blubberhouses village.
The A59 then runs along the head of Fewston Reservoir and follows the route of a Roman road past the 'golf balls' at Menwith Hill, an RAF station.
One of the earliest examples is in Lancashire with the Longton Bypass, which was constructed during 1956–57 at an estimated cost of £491,000 (equivalent to £11,250,000 in 2016).
In Yorkshire at Beamsley Hill, there are two lanes east-bound (on an incline) and a single lane west-bound, some of which was improved at various points during the late 20th century, such as in Hazlewood, where the A59 was rerouted to become a largely straight road, bypassing the now older winding route which exists to its north-west.
It briefly merges with the A6 before heading East and meeting the M6 at junction 31, after which the road splits into two separate carriageways until it meets the A677 for Blackburn.
The road continues over the Embsay and Bolton Abbey Steam Railway through a roundabout junction with the B6260 before rising up Beamsley hill.The A59 is a major road in England which is around 109 miles (175 km) long and runs from Wallasey, Merseyside to York, North Yorkshire.The alignment formed part of the Trunk Roads Act 1936, being then designated as the A59.This century saw the vast majority of the A59's bypasses constructed, some of which were built before trunking, including a bypass of Ormskirk town centre in Lancashire, which appeared on maps from 1929 onwards as "Byepass Road" and subsequently forming the A59.Numerous additional bypasses were built after the road was trunked, to realign the A59 away from routes where it may have previously travelled through busy towns and cities.
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As Skipton Road, the A59 then declines towards Harrogate passing Kettlesing.