Wouldn't you love a little extra warning when someone's headed up to your door? The Driveway Patrol says it can do just that. With an outdoor motion detector and an indoor wireless transmitter, it's supposed to sound an alarm anytime anyone crosses your driveway or before they step up to your door. But does it work? Channel 7's Joe Terrell puts it to the test in his "Does It Work?" report. Tonight. Only on Channel 7 News at 10.