Infantry can be crushed by some vehicles. When a vehicle drives onto a cell where one or more infantry are residing then there is a chance that they'll get crushed. The chance of surviving a crush attempt is 75% for regular infantry and 95% for a hijacker.

Infantry have a higher chance (how much?) to be crushed when standing in a road.

Vehicles that can crush infantry can also crush barbed wires and sandbags. Mammoth tanks can crush concrete walls too.