http://www.remodeling-trade.com/car-painting-worker/

How do the lines on roads get painted?
Are they painted using a machine or do workers walk down the road after they are paved? I kinda imagined that there is a car with a continuous stream of paint being poured in a bucket and it is balanced so that when it is full enough it tips just a little. Kinda like the japanese-style water fixtures. I know the one I’m thinking of is in Kill Bill when she kills the Japanese girl. Anyways, one of those except sideways on a car. That’s what I imagine happens.
They hang midgets upside down from the tailgate of a truck with a bucket of white, and a bucket of yellow paint and a brush.
There is a special machine and paint. It is automatically sprayed on.
Automotive clay modeling 3: painting/ lacquering, tips