Red (stop) is always positioned at the top. Green (go) is always positioned at the bottom. Yellow (slow down/yield) is always positioned in the middle.
For most drivers, a two-second following distance is recommended. If you are colorblind, use a three-second (or greater) following distance.
Stop sign = an octagonal sign with the word “STOP” in large letters. Road condition warning signs = diamond shaped signs with black symbols. For example, a curvy arrow indicates that a winding road is ahead, and a cross means that a cross-roads is ahead. Construction signs (also called temporary traffic control signs) = diamond shaped signs, either depicting a construction worker holding a flag, or with printed text (such as “RIGHT SHOULDER CLOSED. "
Driving at night Driving during snow or rain Driving on winding or steep roads Wildlife on the road
Trouble distinguishing red and green (this is the most common form of colorblindness) Trouble distinguishing blue and yellow Disagreements with others about colors Sensitivity to light Increased night vision Headaches
If you suddenly lose the ability to see colors when you have previously been able to see them normally, contact your doctor immediately. Sudden color vision loss can indicate a serious problem.
Some professions–such pilot or police officer–may be off-limits to colorblind individuals.
