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.

Klang or Kelang, officially Royal City of Klang, is a city, royal city and former capital of the state of Selangor, Malaysia. It is located within the Klang District. It was the civil capital of Selangor in an earlier era prior to the emergence of Kuala Lumpur and the current capital, Shah Alam. Port Klang, which is located in the Klang District, is the 12th busiest transshipment port and the 12th busiest container port in the world.