Malaysian Expressway System - Types of Expressway Interchanges in Malaysia

Types of Expressway Interchanges in Malaysia

These are the different types of expressway interchanges in Malaysia:

• Trumpet interchange - It is usually found in every closed toll system expressway like the North-South Expressway and East Coast Expressway. The trumpet design is popular as a highway exit with toll booths for the closed toll system because of the minimum construction cost of its toll booths.
• Cloverleaf interchange - It is more popular in Malaysia to link two overlapping expressways because of its relatively cheaper cost. The biggest cloverleaf highway interchange in Malaysia is Bulatan Darul Ehsan a.k.a. Shah Alam Cloverleaf Interchange of Federal Highway in Shah Alam, Selangor.
• Diamond Interchange - It is more popular in Malaysia to join the expressway crossing over municipal roads.
• Multi-Level Stacked Diamond Interchange - It is a diamond interchange upgraded into a multi-level interchange. Examples include the Bandar Sunway Interchange between Damansara-Puchong Expressway and New Pantai Expressway in Petaling Jaya.
• Diverging diamond interchange - This is a rare type of diamond interchange which involves temporary lane changes, i.e. from left-hand traffic to right and then back to the left. Like SPUI, it allows traffic from two opposite directions to turn right at the same time but does not allow traffic to go straight ahead. Examples include the Freescale Interchange at Damansara-Puchong Expressway.
• Single-point urban interchange (SPUI) - A SPUI interchange is nearly similar with a typical diamond interchange but it allows traffic from two opposite directions to turn right at the same time; however, it does not allow traffic to go straight. Examples include the Danga City Mall interchange at Skudai Highway / Johor Bahru Inner Ring Road.
• Roundabout interchange - Very popular in Malaysia.
• Parclo interchange - An example of this is the Port Dickson Interchange on the North-South Expressway and Kapar Interchange on the New North Klang Straits Bypass.
• Directional T interchange - These interchanges are found at Nilai North and Nilai Interchanges of North-South Expressway and also Setia Alam Interchange and Bukit Lanjan Interchange on New Klang Valley Expressway.
• Stacked Interchange - Examples of these are the Penchala Interchange on the Damansara-Puchong Expressway and Penchala Link of the Sprint Expressway.
• Multi-Level Stacked Interchange - Examples of these are the Ampang Interchange on the Jalan Ampang and the Ampang flyover of the Kuala Lumpur Middle Ring Road 2.
• Multi-Level Stacked Roundabout - There are three-level and four-level roundabouts found in Malaysia. Examples of four-level roundabouts include the Segambut Interchange of Kuala Lumpur-Rawang Highway and Kewajipan Interchange of New Pantai Expressway.
• Double U-Turn Interchange - These interchanges found at Tampoi North interchange on the Skudai Highway and Pasir Gudang Highway.
• Left in/left out (LILO) junction - These junctions restrict the ingress and egress of the minor roads; they only permit left-turn entries. To turn to opposite direction, motorists may need to make a U-turn on the expressway. These junctions are very common in urban expressways such as in Sungai Besi Expressway and Damansara-Puchong Expressway.