Don't post to Twitter while merging onto Interstate 25.
Don't steer with your knees while Googling for directions. Don't sneak in a behind-the-wheel response to an e-mail, not even at a stoplight.
The tweet is gone. If you text and drive, cops in Colorado starting Tuesday are going to bust you.
"It's extremely dangerous," Colorado State Patrol spokesman Ryan Sullivan said. "Hopefully . . . by people knowing it's against the law, it will keep people from doing it."
A new law taking effect Tuesday bans texting while driving for all drivers. The law also bans all cellphone use — texting and talking — for drivers younger than 18. The legislature passed the laws during its session this year in the hopes of cutting down on accidents caused by cellphone-distracted drivers.