Colorado drivers under ___ years of age are not allowed to use cell phones while driving, except in an emergency or to contact the police or fire department.

Colorado law prohibits drivers under 18 years of age from using cell or mobile phones while driving except in an emergency or to contact the police or fire department. Drivers 18 and older may not use a cell or mobile telephone for text messaging while driving except in an emergency or to contact the police or fire department. [Using a Cell Phone or Mobile Telephone While Driving, Understanding Colorado's Motor Vehicle Laws, The Driver License, Colorado Driver Handbook]