A state lawmaker wants to require repeat offenders to install blood-alcohol testing devices in their cars.

Senator Jerry Hill has introduced legislation to make ignition-interlock devices mandatory after a second DUI conviction.  

Hill said the devices are effective because they test drivers both before starting the car, and periodically along the ride.

"If you blow into the tube with alcohol or exceed the limit," Hill said, "then it will record a violation. That will go against the driver as not successfully matriculating the program and it will be a problem down the line."

Hill said the strategy is practically a "foolproof" way to reduce drunken-driving violations.

A study funded by the National Highway Traffic Safety Administration found that in New Mexico, installing the devices after a second offense reduced recidivism by 60 percent.