The North-South Expressway (NSE) (Malay: Lebuhraya Utara-Selatan) is the longest expressway in Malaysia with the total length of 966 km (600 miles) 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. 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).
This expressway passes through 7 states on the peninsula: Johor, Malacca, Negeri SemBan, Selangor, Perak, Penang and Kedah. It provides a faster alternative to the old Federal Route , thus reducing travelling time between various towns & cities.