Ackermann Angle

A point to note is when you turn your car, your wheels don't point in an identical angle. If they did, the car would be hard to turn and difficult to control.

This is because the car has to follow two different curves to go around a simple bend.

 So, the steering system must accommodate the severity of the bend and react so both wheels make the correct arc, permitting the vehicle's cabin to go around the bend safely and comfortably.

For those technically inclined, it is called the "Ackermann angle."