Signs, signals, and pavement markings

Signs, signals, and pavement markings

Learn the shape and color before the wording. On the exam—and when visibility is poor—those are your fastest clues.

Sign families

Red: stop, yield, prohibition, or wrong way. An octagonal red sign means STOP; an inverted red-and-white triangle means YIELD.
Yellow: warning: curve, merge, crossing, changing conditions. Slow and prepare.
Blue: services or motorist information.
Green: direction, route, distance, or permitted movement.
White/black: regulatory rules, including speed limits and lane-use controls.

Signal essentials

  • Steady red: stop. Turn right only after a complete stop if permitted, the way is clear, and no sign prohibits it.
  • Flashing red: treat as a stop sign.
  • Flashing yellow: slow down and proceed with caution.
  • Yellow arrow/light: the protected movement is ending; stop if you can do so safely. It does not mean “speed up.”

Lines tell a story

A broken white line separates same-direction lanes and may be crossed when safe. A solid yellow line marks the left edge of traffic traveling in your direction; do not use the opposing side as a passing lane. Double solid yellow generally means no passing in either direction.

An upside-down red-and-white triangle means:

A flashing red traffic signal should be treated as:

Further reading

Colorado Driver Handbook—traffic signs and signals