From Port Technology:

Multi-trailer system

The multi-trailer system allows three 40-foot containers, or six 20-foot containers, to be transported simultaneously.

A new line of port equipment has been delivered to Manila International Container Terminal. The multi-trailer system (MTS) allows three 40-foot containers, or six 20-foot containers, to be transported simultaneously.

The MTS has been delivered by International Container Terminal Services Inc. (ICTSI) and allows for the transportation of more containers in a single haul than compared to the traditional single-trailer system.

Composed of a single tractor unit and several trailers set in ship-to-stack mode, the MTS can transport containers to and from the wharf during vessel operation.