
"Giving drunk drivers a free tool to evade checkpoints, putting innocent families and children at risk, is a matter of public concern," the letter from the senators states. They have asked the firms to remove the apps from stores, saying they present a real threat to public safety.
The apps apparently allow users to alert each other to the locations of police stops. The letter does not name the apps specifically, but claim they have as many as 10 million users and offer databases of police checkpoints updated in real-time.
According to the U.S. Department of Transportation, around 10,000 people are killed each year in accidents that involve drunk drivers.