Senators Frank R. Lautenberg (D-NJ), Harry Reid (D-NV), Charles E. Schumer (D-NY), and Tom Udall (D-NM) called the apps "harmful to public safety" in a March 22 letter to the three mobile industry leaders.

"We appreciate the technology that has allowed millions of Americans to have information at their fingertips, but giving drunk drivers a free tool to evade checkpoints, putting innocent families and children at risk, is a matter of public concern. We hope that you will give our request to make these applications unavailable immediate consideration," the letter states.

One such app is , a 99-cent utility in Apple's App Store that alerts users to DUI checkpoints within a 100-mile radius of their current location.

"This app has totally saved me from getting a DUI multiple times! Must have for everyone!" writes App Store customer "Joyanne P" in the customer reviews section for Buzzed.

"Police officers from across the country have voiced concern about these products, with one police Captain saying, 'If people are going to use those, what other purpose are they going to use them for except to drink and drive?' With a person dying every 50 minutes in a drunk-driving crash, this technology should not be promoted to your customers - in fact, it shouldn't even be available," the senators' letter states.