(Phoenix, AZ) -- The Arizona Department of Transportation says its wrong-way detection and warning system on I-17 caught its first wrong way driver on the interstate. ADOT says the system alerted officials early Thursday morning to a vehicle traveling southbound in the northbound lanes on I-17 between the Loop 101 and Bell Road. Troopers were able to stop the vehicle and there were no resulting crashes. The driver was taken into custody on suspicion of DUI. The wrong way detection pilot program began in January on 15 miles of the interstate through Phoenix. Since then, the system has detected more than 20 vehicles entering I-17 off-ramps and frontage roads.