What is SPMT Trailer ? A self-propelled modular transporter (SPMT), also sometimes known as a self-propelled modular trailer, is a type of heavy hauler that is used to transport massive objects, such as large bridge sections, oil refining equipment, cranes, motors, spacecraft, and other objects that are too big or heavy for trucks. SPMTs are … Continue reading SPMT Self propelled modular transporter types uses availbilty with pros and cons