A portion of California's graduated license program has slashed death and injury of teen drivers and passengers. According to the Auto Club of Southern California, deaths and injuries of 16-year-old drivers are down about 27 percent, between 11 p.m. and midnight. Also, deaths of passengers of 16-year-old drivers fell an amazing 40 percent. California's graduated license is a three-step process. First, they must drive 50 hours -- 10 of which must be at night -- with an adult in the right seat, complete a six-hour training course and receive no traffic citations. Once the student receives a provisional license they may not carry passenger under 20. Between 11 p.m. and 5 a.m., the provisional driver must be accompanied by a driver over 25. Other restrictions include a zero tolerance for alcohol until age 21. Also, those under 18 may not use any electronic communication device, including cell phones.