It serves as the main access road to Kuala Lumpur International Airport (KLIA), as well as the nearby Sepang International Circuit and Bandar Enstek.

The total length of the expressway is 11.4 km (7.1 mi).

The remaining sections of expressway connecting to KLIA is numbered as Federal Route 26 and maintained by the Malaysian Public Works Department.

[1] At most sections, the Federal Route 26 was built under the JKR R5 road standard, with a speed limit to 90 km/h.

There is one overlap: KLIA Interchange–KLIA airport boundary : E6 North–South Expressway Central Link.