What does a flashing yellow light mean?

Slow down and proceed with caution. It does not require a stop — that's the flashing red, which is treated exactly like a stop sign.

Can you turn right on a red arrow?

In many states, no — a red arrow prohibits movement in that direction until it changes, and several states forbid turning on it even after a stop. Rules vary, so learn your state's version and watch for posted signs.

What do you do at an intersection when the traffic lights are out?

Treat it as an all-way stop in most states: come to a complete stop, then proceed using four-way-stop right-of-way rules.

Traffic Lights and Signals: Every Light, Every Arrow

Everyone knows red, yellow, green. The permit test knows you know — so it asks about the variants: flashing yellow, flashing red, a red arrow, a signal with no power. Those four cases decide most signal questions, and each has one precise legal meaning.

The steady lights, precisely

Steady red: stop behind the line and stay stopped. In most states you may turn right on red after a complete stop and a full yield — unless a sign prohibits it (and note that New York City bans it by default). Steady yellow: the light is about to turn red — stop if you can do so safely; it is not an invitation to accelerate. Steady green: go, but only after yielding to anyone lawfully still in the intersection.

Flashing lights

A flashing red light is legally a stop sign: full stop, yield, proceed when clear. A flashing yellow means slow down and proceed with caution — it does not require a stop. Test writers bank on students blurring these together; keep them apart by severity: flashing red = stop sign, flashing yellow = caution sign.

Arrows

A green arrow is a protected move: oncoming traffic is stopped while your arrow shows. A steady red arrow means no movement in that direction — and in many states you may not turn on a red arrow even after stopping, which is exactly the distinction the test probes. A flashing yellow arrow, now common at left-turn signals, means the turn is permitted but unprotected: yield to oncoming traffic first, exactly like turning left on a green ball.

Dark signals and lane-control lights

A signal with no power is treated as an all-way stop in most states — stop, then use four-way-stop rules. Overhead lane-control signals on reversible lanes use a green arrow for open, a red X for closed, and a yellow X for 'move out of this lane now.' Driving under a red X is a violation even if the lane looks empty.

Now make it stick

Reading builds recognition — answering builds recall. Drill this topic with original practice questions and full explanations.

Practice Signals questions

Frequently asked questions

What does a flashing yellow light mean?: Slow down and proceed with caution. It does not require a stop — that's the flashing red, which is treated exactly like a stop sign.
Can you turn right on a red arrow?: In many states, no — a red arrow prohibits movement in that direction until it changes, and several states forbid turning on it even after a stop. Rules vary, so learn your state's version and watch for posted signs.
What do you do at an intersection when the traffic lights are out?: Treat it as an all-way stop in most states: come to a complete stop, then proceed using four-way-stop right-of-way rules.