When police departments set up DUI checkpoints, they often advertise their plans, added Scott. "All we're doing is we're taking information and pushing it toward the drivers," he said. "A lot of police departments are saying that part of the campaign is awareness. If PhantomALERT gets the word out ... that's going to deter a lot of people from drinking and driving."

PhantomALERT, available since 2008, points out speed traps, red-light cameras, high-accident intersections, speed bumps and other traffic hazards.

The IDG News Service