The term "car driver" is not possessive. A "car driver" is compound noun for a person who is capable of driving a car.
Example: We should hire a car driver to show us the sights.
The possessive form is "car's driver", the driver of the car.
Example: The car's driver did not stop at the stop sign.
The possessive form of the singular noun driver is driver's.Example: A driver's license is required to drive a car.
The possessive form for the noun driver is driver's.
driver's
The possessive form of the singular noun driver is driver's.Example: There was a small dent in the driver's door.
The possessive form for the singular noun driver is driver's.Example: I passed the test and got my driver's license today.
A stock car.
The singular possessive for car is car's.example: The car's tyre was flat.
The singular possessive form for the noun driver is driver's.The plural form is drivers.The plural possessive form is drivers'.Examples:I waved to get the driver's attention.We bought a new coffee maker for the drivers' lounge.
The possessive form of the singular noun driver is driver's.example: She always leave the driver's seat in the far forward position.
The possessive form of 'the car of your mom' is your mom's car.
The possessive noun is "son's". My son's car = the car of my son.
Drivers