intersection with Gwydir Highway in South Grafton, subsuming Main Road 140 and the alignment of Main Road 151 between Casino and South Grafton; Main Road 151 was truncated at South Grafton as a result. New England Highway was re-routed through Warwick and Cunninghams Gap in Queensland on 11 August 1954. Against the wishes of the Beaudesert Shire Council and the Woodenbong Chamber of Commerce, the former alignment of New England Highway from Tenterfield through Beaudesert to Brisbane was re-declared Mount Lindesay Highway, after Mount Lindesay, the residue of a solidified magma core, that is part of the Mount Warning volcanic area and is situated in the western extreme of Border Ranges National Park. The Department of Main Roads (which had succeeded the MRB in 1932), declared the New South Wales section as State Highway 24, from Woodenbong to the state border with Queensland (and continuing southwest via Legume to Tenterfield). Trunk Road 83 was officially named Summerland Way on 10 April 1974. The New South Wales section of Mount Lindesay Highway, which still included unsealed portions, was eventually de-gazetted as a highway by the Department of Main Roads on 23 December 1981 due to very low traffic volumes, it was renamed Mount Lindesay Road and re-declared as Main Road 622. Summerland Way was consequently extended north 9.4km along the alignment of the former highway to meet the Queensland end of Mount Lindesay Highway at the state border, and the eastern end of Mount Lindesay Road was truncated at the intersection with Summerland Way just east of Woodenbong. The passing of the Roads Act of 1993 updated road classifications and the way they could be declared within New South Wales. Under this act, when Pacific Highway's Grafton bypass opened in May 2020, Summerland Way (as Main Road 83) was officially extended south along the old alignment of Pacific Highway on 5 July 2022, although the road is known locally and sign-posted as Big River Way. Summerland Way today, as part of Main Road 83, still retains this declaration. In 1996, the Federal Government committed $20 million toward upgrading the Summerland Way. A $7 million contract to realign 1.2 km at Dourrigan's Gap, approximately 16 km north of Kyogle, was awarded, with work starting in February 2002 and expected to take 12 months to complete. Summerland Way was signed State Route 91 across its entire length in 1974. With the conversion to