It is a combination of rail and road. The containers are placed on
railway flat-cars and transported by rail from one terminal to
another. After reaching the destination terminal, they can be placed
on trailers and transported by roads which are also called as TOFC
that is Trailer on Flat Car or COFC- Container on Flat Car.
The best known and most widely used intermodal system is the trailer on a flatcar (TOFC). Piggyback or trailer – on flatcar is specialized form of containerization in which rail and transport coordinate. In piggyback, the carrier places the carrier trailer on a rail flatcar, which moves the trailer by rail for long distances. And then motor carrier moves the trailer for short distances for pickups and deliveries.