Concern for safety on Rockland County roads has prompted Clarkstown police to crack down on cell phone use behind the wheel.

A new study by the British Medical Journal shows that drivers are four times more likely to crash while talking on a cell phone. Talking on a cell phone without a hands-free device while driving is illegal in New York and New Jersey. During the Clarkstown Police Department?s two-day crackdown, one police officer issued 10 tickets in a half an hour.

Residents who get ticketed must pay a fine or purchase a hands-free device for the phone and present it to the judge.