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| end_b = | est = | route = | former = | exits = | through = Hebel, Walgett, Gilgandra, Mudgee, Cullen Bullen }} The Castlereagh Highway is a state highway in New South Wales, Australia, also extending into Queensland. It runs between Lithgow, through central-western NSW then to the Carnarvon Highway in Queensland. ==Route== The highway was extended past Gilgandra to include state route 86 in October 1997. As such the Castlereagh Highway starts just outside Lithgow at a junction with the Great Western Highway and runs in a north-westerly direction through Ilford and the junctions of Bathurst-Ilford Road and Bylong Valley Way, through the regional centre of Mudgee and Gulgong. From there it joins with the Golden Highway through Dunedoo, then branches off in Dunedoo, continuing past Gilgandra until it reaches the Queensland border via Walgett at Hebel. From there it continues to the outskirts of St George where it terminates with the Carnarvon Highway. The highway was signed National Route 55 in 1974 north of Gilgandra, and State Route 86 south of Gilgandra. QLD however signed the Carnarvon Highway as National Route 55 rather than the Castlereagh Highway, causing a major discrepancy for many years in that National Route 55 met the QLD border at Hebel but abruptly begun again over 100km east along the QLD border at Mungindi. The Queensland Road Department changed this and signed National Route 55 over the border north to Charters Towers in later years. This route was soon replaced with the A7 and A55 designations throughout QLD in 2005, and the B55 designation in NSW during 2013 to Gilgandra and then south to Lithgow, replacing both State Route 86 and National Route 55. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Castlereagh Highway」の詳細全文を読む スポンサード リンク
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