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Di laman Lebuhraya Utara–Selatan Jajaran Utara:

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The North–South Expressway northern route, being part of the larger North–South Expressway network, was constructed in phases simultaneously with the south section. The first segment on this expressway, from Bukit Kayu Hitam to Jitra, was opened on 1 April 1985, originally as part of Federal Route 1. The first controlled-access highway segment, from Ipoh to Changkat Jering, was opened by the then Sultan of Perak, Azlan Shah on 28 September 1987.[perlu rujukan]