Explorers, colonists and armies are often faced with geographical barriers such as valleys, hills or lakes which must be traversed.
Today’s invention is a way to create the necessary ad-hoc viaducts quickly.
Imagine a vehicle with tracks which rotate around its outer perimeter (just like WW1 Mk1 tanks). These would be simple, watertight boxes with motors aboard which could be controlled remotely.
The boxes would manoeuvre and ride up on each other so as to flexibly create triangles which would lock together at the corners into a rigid network structure.
A roadway or railtrack could be rolled across the upper surface to allow other, people-carrying vehicles not to be impeded by any surface features.