PHILADELPHIA (WPVI) -- Pennsylvania drivers caught holding their phones while behind the wheel could now be pulled over, thanks to a new law.

Paul Miller's Law went into effect Thursday. It bans the use of handheld devices while operating a vehicle in Pennsylvania. Advocates, most notably, Paul Miller's mom, really believe this law will save lives.

"I was proud to be his mom. I loved him and I needed him to know that I was there," said Eileen Miller, who has been working toward the law for more than a decade. It's a promise fulfilled to her son after he was killed by a distracted driver.

MORE | New Pennsylvania law bans all handheld devices behind the wheel

"I whispered in his ear that when I found out what caused that crash that I would fight for change. I just never thought it wou

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