Photo radar enforcement on the Loop 101 is underway with the start of this workweek. In the first 24 hours since the cameras started snapping photos of drivers going 76 miles per hour and faster, there were more than 2,000 flashes along the freeway. Warnings will be going out to drivers for the next 30 days. Tickets will start being sent to speeders starting at the end of February. Scottsdale is believed to have the first digital speed enforcement in effect in the nation. If this nine-month test is successful, the city's photo radar system could become a model for...