Navigating the world can often be easier with the aid of one of various transportation vehicles which man has created. Bicycles, motorcycles and mopeds, cars, boats, and aircrafts have been designed to extend the mobile capabilities of man while decreasing energy expenditure.

Knowledge of the workings of various transportation machines enables the explorer to maintain and repair them.

Further Reading
Chilton's Motorcycle Handbook - Ben Greilser & Kevin Maher - @ 1998 - Chilton Automotive Books

Auto Repair for Dummies -