Directional stability is said to be the steadiness with which a car

Can be driven according to the way the driver wishes

Explanation:

Directional stability is commonly known as "weather vaning". Directional stability is said to be the steadiness with which is free to move around its centre of mass as per the control of the driver. This phenomena is also used in traction control of vehicles.

This technique is vastly used in Air crafts. The vertical fins and the sides of the fuel area of the aircraft and the centre of gravity are main components in directional stability of aircarft