Traffic Separation Scheme (TSS) is an area where navigational rules for ships have been established. Each TSS designates specific routes to ensure that ships sailing in the area follow the same direction.

A TSS is typically established in areas where there is heavy ship movement in different directions, resulting in a very high risk of collision. Information on the TSS and this routing system can be obtained from Admiralty charts.

• Pursuant to the decision of the 18th Tripartite Technical Expert Group (TTEG) meeting held in Kuala Lumpur in 1993 to review the existing ship routing system, a TTEG working group was established;
• In 1994, the proposal was approved by the Littoral States and was to be submitted by Malaysia to the IMO at the 41st Navigation Safety Session;
• Approved at the IMO, Sub-Com on Safety of Navigation on the 43rd Session – May 1998;
• Adopted at the IMO, Maritime Safety Com 69th Session on 26th May 1998 SN/Circ.201;
• Came into effect at 0000 Hours UTC, 1st December 1998.