Pieces that are painted in hard-to-reach places such as rooftops and freeway signs, thus making them hard to remove.

There had been freeway signs, and the ghosts of dark buildings, a mountain range done all in right angles.

Early in the film, Harris is befriended by a freeway sign that speaks to him with its digital lettering.

Quentin looked up at the freeway sign announcing the next exit.

Heat-Induction bending is used on large pipes such as freeway signs, power plants, and petroleum pipe lines.

Another Mudd prank involved slight modifications to a freeway sign.

It seems pretty tame compared to hanging off a rooftop or a freeway sign.

It includes surreal sequences in which he is offered romantic advice flashed to him by a freeway sign.

By the story's conclusion, he has successfully wooed Sara - with some encouragement and advice from the freeway sign.

It's also the only one of the three that identifies highway exit numbers - a boon when you're trying to track unfamiliar freeway signs.