Coming in at $25,000 a piece, the Long-Range Acoustic Device, a sonic weapon best know for its use against protesters and insurgents in Afghanistan, will alert drivers to road conditions by shooting a loud verbal message through their windshields.

“The LRAD puts out up to 153 decibels of sound through an emitter, not a loud speaker,” said MoDOT employee Michele Compton. “The sound easily penetrates the windshield and well-insulated cab of a car, even overriding the vehicle’s engine sounds and a radio turned up loud enough to jam to tunes at highway speeds.”