"Wrong-way Driving Crashes Claim Hundreds of Lives." Channel One. N.p., 11 Dec. 2012. Web. 11 Dec. 2012. <www.channelone.com>.
One technology already required in 17 states for all convicted first-time drunken-driving offenders is ignition interlock devices that test their breath for alcohol concentration. The devices, mounted on the vehicle's dashboard, prevent the engine from starting if the driver's alcohol concentration is too high.
Paraphrase: 17 states already require putting a breathalyzer in cars of people who have been convicted of drunk driving.