The plan to build the bypass to Port Klang began in the late 1970s. Construction began in 1983 and completed on 1 January 1985. Today this highway are maintained by the Lebuhraya Shapadu Sdn Bhd (a member of Shapadu Corporation Sdn Bhd) and Malaysian Public Works Department (JKR). By the 1990s to 2000s, the highway was bogged down with severe congestion, and the present New North Klang Straits Bypass was built to replace it. On 2009, the Port Klang toll plaza was closed and the parts of Jalan Kapar – Port Klang sections became a toll free highway. In 2014, the expressway was taken over to LGB Group and its name was changed to Grand Sepadu Sdn Bhd.

• Two-lane carriageway
• Emergency lane.
• Toll.
• Speed trap.
• Variable Message Sign (VMS)
• Many container trucks along this highway.
• Many kampungs (village) along this highway.
• Massive accident area along this highway.
• Many traffic lights along this highway.

At most sections, the Federal Route 20 was built under the JKR R5 road standard, allowing maximum speed limit of up to 90 km/h.

There are no alternate routes or sections with motorcycle lanes.

• Northport, Port Klang – Port Klang toll plaza : E30 New North Klang Straits Bypass
• Bukit Raja toll plaza – Sungai Rasau : E30 New North Klang Straits Bypass

Class	Type of vehicles	Rate (in Malaysian Ringgit (RM))
0	Motorcycles, bicycles or vehicles with 2 or less wheels	Free
1	Vehicles with 2 axles and 3 or 4 wheels excluding taxis	RM0.60
2	Vehicles with 2 axles and 5 or 6 wheels excluding buses	RM1.00
3	Vehicles with 3 or more axles	RM1.00
4	Taxis	RM0.50
5	Buses	RM1.00

Km	Exit	Interchange	To	Remarks
	EXIT 232	Sungai Rasau Junctions	Jalan Batu Tiga Lama West Klang EAST Padang Jawa	T-junctions
	EXIT 233	Sungai Rasau Interchange	Federal Highway West Klang East Shah Alam Kuala Lumpur	Diamond interchange
	EXIT 2001A	Bandar Baru Klang Exit	West Persiaran Bukit Raja Bandar Baru Klang Bukit Raja Shopping Centre 🏬	To Port Klang only
	EXIT 2001B	Lebuh Keluli Exit	East Lebuh Keluli Bukit Raja Industrial Area (South) Section 7 Shah Alam	From Port Klang only
		Bukit Raja North – Bukit Raja	see also Invalid type: AH New North Klang Straits Bypass
5 5	EXIT 2004	Bukit Raja North Interchange	Northwest Invalid type: AH New North Klang Straits Bypass Port Klang Kapar Klang Utara Rest and Service Area	Half Trumpet Interchange From Federal Highway Only Western terminus of concurrency with Invalid type: AH
Bukit Raja North toll plaza RM（现金） TnG TAG TAG TnG RM（现金） Opened toll systems Pay toll
		Bukit Raja toll plaza		Pay toll only
20 Invalid type: AH North Klang Straits Bypass
20 North Klang Straits Bypass
				Start/End of dual-carriageway
	EXIT 2005	Jalan Meru Interchange	Jalan Meru North Meru Bestari Jaya (Batang Berjuntai) Puncak Alam Setia Alam South Klang	Diamond interchange
11
		Kampung Batu Belah	North Jalan Bahagia Kampung Batu Belah Jalan Haji Sirat South Taman Sentosa	Junctions
		Sekolah Kebangsaan Batu Belah
		Masjid Sirajuddin Al-Anuar, Kampung Batu Belah
		Taman Sentosa, Klang
		Jalan Istimewa	North Jalan Istimewa	T-junctions
		Jalan Labis 65	Southeast Jalan Labis 65	T-junctions
10
		Jalan Sungai Putus	North Jalan Sungai Putus	Junctions
9.3
9.2	EXIT 2006	Jalan Kapar Interchange	North Kapar Kuala Selangor Teluk Intan South Klang	Junctions
9.1
9		Template:Petrol station sign Shell	Template:Petrol station sign Shell
		Jalan Goh Hock Huat	East Jalan Goh Hock Huat Klang	Junctions
	EXIT 2007	Kampung Rantau Panjang Junctions	North Jalan Kampung Rantau Panjang Kampung Rantau Panjang	T-junctions
		Sungai Che Wang bridge
20 North Klang Straits Bypass
20 Invalid type: AH North Klang Straits Bypass
				Start/End of dual-carriageway
	EXIT 2008	North Klang Interchange	Northeast Invalid type: AH New North Klang Straits Bypass Kuala Lumpur Shah Alam Kapar	Half Trumpet Interchange From Northport Only Eastern terminus of concurrency with Invalid type: AH
		North Port – North Klang	see also Invalid type: AH New North Klang Straits Bypass