Another word that can be used other than the family vehicles is the family car.
Another word for a mine vehicle is a tram. These are the little carts with wheels that go in and out of the coal mine.
A family car is another word that can be used to describe the family vehicle.
Family in law
Family of orgin
head of a family
Tyrannical is one...
A Miracle
squabble
dynasty
legumes
The word 'line' is a collective noun for a line of vehicles. Another collective noun is a fleet of vehicles.
family