Gryffindor: The Speeder, will drive over the speed limit when they can but is never caught.

Ravenclaw: The Lawful driver, drives the same speed as the speed limit.

Hufflepuff: The Slowpoke, drives well below the speed limit, often passed by Gryffindor.

Slytherin: The Chaotic driver, often drives like they bought their licence [which they probably did], unpredictable on the road.