Dachser's swap body gave road boxes legs to hop onto rail.

Rail is cheap for long hauls but poor at door delivery, and trucks are the opposite, so the two modes normally meet only where a crane can lift a container between them.

In the late 1960s Dachser's Thomas Simon was inspired by the maritime container and proposed a swap body: a freight body with fixed dimensions and fold-out legs that can stand on its own, so a truck can drop it and a rail wagon can pick it up. The first was made in 1971.

The swap body let a trucking company reach rail without building a crane, and once the system was standardised in 1980 any hauler could use any box, so intermodal service moved beyond the big seaports into everyday road journeys.

Give the box legs so it can change mode alone

Fold-out legs let the box stand and be transferred without a crane.

Standardised size makes boxes interchangeable among haulers and rail wagons.

Swap bodies grew truck-only freight into road-rail intermodal without new terminals

A truck can carry its box to a factory the rail cannot reach, then send it on rail

Interchangeability beats crane capacity: a box that lifts itself lets small truckers join a big intermodal system.

The swap body became the standard European intermodal load unit, letting road hauliers carry the same box to and from rail, and Dachser grew into a major European logistics operator around the idea.