The statewide law prohibits drivers from handling mobile devices while operating a vehicle.
The ban applies whether a vehicle is moving or stopped at a traffic light, stop sign or in traffic. Officers can stop drivers observed holding a phone while behind the wheel.
After a one-year educational warning period, the law took full effect in June. Authorities say the weeklong enforcement initiative is intended to raise awareness of the law and encourage broader enforcement by police departments throughout the county.
"We have a minimum of six departments in the county right now that are participating, but I'm hoping that as we get through the week, we'll have even more officers involved," said Rich Vona, director of Bucks County Emergency Services.
Action News accompanied Warrington police as officers began the enforcement campaign targeting distracted drivers.
Lt. Robert Meditz of the Warrington Police Department said distracted driving remains a serious safety concern.
"It's very important because when you're distracted, you're not paying attention to what's going on around you and that's causing crashes and we're just trying to stop that," Meditz said.
Miller's Law is named after Paul Miller, who was killed in a crash in Monroe County in 2010.
According to authorities, the investigation determined the crash, which involved a tractor-trailer, resulted from a distracted driver reaching for a cellphone before losing control of the vehicle.
Law enforcement officials say distracted driving continues to be one of the leading causes of motor vehicle crashes, injuries and fatalities nationwide. The targeted patrols and enforcement details are aimed at reducing those incidents.
A violation of Miller's Law carries a $50 fine plus court fees. The violation does not add points to a driver's license.