Rear-drive trucks and tractors are popularly accepted as being all that is desired so long as working conditions are not bad enough to prevent their operation. Caterpillars are admitted to be able to go where it is so soft that no other vehicle can navigate, but they are considered as too slow, awkward and expensive to use where the work can be done with wheel-equipped machines. The paper discusses the field of the four-wheel drive.
The experience of the Army in motor-transport work is referred to and the application of four-wheel drive to tractors is discussed in some detail.
