The North–South Expressway (NSE) (; Jawi: ليبوهراي اوتارا-سلتن; ) is the longest controlled-access expressway in Malaysia with the total length of about running from Bukit Kayu Hitam in Kedah near the Malaysian-Thai border (connects with Phetkasem Road (Route 4) in Thailand) to Johor Bahru at the southern portion of Peninsular Malaysia and to Singapore. The expressway links many major cities and towns in western Peninsular Malaysia, acting as the 'backbone' of the west coast of the peninsula. It is also known as PLUS Expressway, named after the highway's concessionaire, Projek Lebuhraya Utara Selatan Berhad (North South Expressway Project; abbreviated as PLUS). But today the company changed its name into Projek Lebuhraya Usahasama Berhad (PLUS) which is a company subsidiary of PLUS Malaysia Berhad (PMB).