Yellow Department of Transportation trucks have been used to disguise roving patrolmen. The North Carolina Highway Patrol used them for a pilot program in which troopers patrolled for people who illegally text while driving.
Lieutenant Jeff Gordon says it's hard for roadside troopers to see whether motorists are texting, and people are quick to stop if they see a police cruiser.
“So you need to be creative in ways of trying to get people to abide by the law. I wouldn't classify it as tricking people because it is a law, and laws need to be enforced.”