More than 600 citations were issued last week by the CHP and county law enforcement in an effort to crackdown on drivers whotalk or text on a cell phone while driving. The "zero tolerance" policy ran for three days, January 18-20 throughout San Diego county. Nearly 600 citations were issued for drivers using cell phones. Another 36 citations were issued for drivers reading or texting on an electronic device while driving. A similar, but larger campaign in November, 2010 resulted in over 1,100 citations. The CHP promised that their campaign against using cell phones while behind the wheel will be a prolonged campaign, and assured the public that similar zero tolerance crackdowns will be waged not only in San Diego, but also in Orange and Imperial counties.