A new Californian law has come into effect at the turn of the new year, placing teen driver's under curfew. Teens who have held their licence for less than a year are not allowed to drive between 11pm and 5am, according to the law.
Also, they are only able to drive with young passengers in the car if an adult is also present. The law was passed after it was found that inexperienced teen drivers were more at risk during the nighttime hours.
Similar measures are being considered in other US states, as well as in some European countries.