The PLUS Expressways Berhad is the largest highway concessionaries or build–operate–transfer operator company in Malaysia. A member of the UEM Group, the company is also the largest listed toll expressway operator in Southeast Asia and the eighth largest in the world.

The New Klang Valley Expressway (NKVE), designated E1, is an expressway entirely within the Klang Valley region of Selangor and Kuala Lumpur in Peninsular Malaysia. The expressway begins at the settlement of Bukit Raja near Klang, and ends at Jalan Duta in Kuala Lumpur. The 35-kilometre (22-mile) expressway is one of the most heavily utilised expressways in the Klang Valley region. The expressway shares its designation with the North–South Expressway Northern Route.