Question: is it legal to turn right on red in colorado

Answer: Yes, Right turns on red are permitted in many regions of North America. While Western states have allowed it for more than 50 years; eastern states amended their traffic laws to allow it in the 1970s as a fuel-saving measure in response to motor fuel shortages in 1973. The Energy Policy and Conservation Act of 1975 required in §362(c)(5) that in order for a state to receive federal assistance in developing mandated conservation programs, they must permit right turns on red lights. All 50 states, the District of Columbia, Guam, and Puerto Rico have allowed right turns on red since 1980, except where prohibited by a sign or where right turns are controlled by dedicated traffic lights. (The last state with a right-on-red ban, Massachusetts, ended its ban on January 1, 1980.) The few exceptions include New York City, where right turns on red are prohibited, unless a sign indicates otherwise.