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South Carolina driving lesson · Signs, Signals & Markings

Traffic signals

A 3-minute lesson from the South Carolina course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Signs, Signals & Markings
Checkpoint questions
6
Source pages
61, 62, 63

Traffic control devices tell every road user when and where to stop and go. Signals are the most common, but directions from people at the scene count too.

Traffic control devices

Traffic signals, signs, pavement markings, and directions given by law enforcement, highway personnel and school crossing guards.

Handbook p. 61 ↗

Know the rule

Vertical signals show red on top, yellow in the middle, green on the bottom. Horizontal signals (in some metropolitan areas) show red on the left, yellow in the middle, green on the right.

Handbook p. 62 ↗
Traffic signal (red, yellow, green)
Green, yellow and red signals

Signal meanings

Signal meanings
SignalWhat you do
GreenGo through if the intersection is clear, with caution
YellowAbout to turn red: stop; if already in it, clear it
RedStop behind the stop line, crosswalk or intersection
Flashing yellowSlow down, proceed with caution, be ready to stop
Flashing redCome to a complete stop, then treat it as a stop sign
Handbook p. 62 ↗

Know the rule

Some intersections and other locations have lights of only one color: green, yellow or red.

Handbook p. 61 ↗

Know the rule

Approaching a yellow light, watch for and allow for mistakes by other drivers at your sides, front and rear.

Handbook p. 62 ↗

Know the rule

At a red light you must wait behind the stop line, crosswalk or intersection until the light turns green.

Handbook p. 62 ↗

Know the rule

Right turn on red is allowed unless a sign prohibits it. Stop before the near crosswalk, then yield to pedestrians in or next to the crosswalk and to other traffic.

Handbook p. 62 ↗

Know the rule

At a flashing red light, stop completely, look both ways, and yield the right-of-way if needed before entering.

Handbook p. 63 ↗

Put it into practice

You're stopped at a red light, want to turn right, and see no NO TURN ON RED sign. After your full stop, a pedestrian steps into the crosswalk you'd turn across. Wait for them to cross and for traffic to clear, then turn.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

A yellow traffic light means:
  1. Red is next; prepare to stop
  2. You must speed up to beat the light
  3. You may proceed without caution
  4. Stop only if a pedestrian is waiting

Answer: Red is next; prepare to stop

A yellow caution light is a warning that the signal is about to change to red; you should stop and wait for the next green light.

Handbook p. 62 ↗
A red traffic light means you must:
  1. Slow down but you may proceed
  2. Stop before the intersection
  3. Stop only if pedestrians are present
  4. Yield only to cross traffic

Answer: Stop before the intersection

A red light means stop before entering the intersection and wait behind the stop line until it turns green.

Handbook p. 62 ↗
When may you turn right on a red light in SC?
  1. Never, it is illegal statewide
  2. Only between 6 a.m. and 6 p.m.
  3. After stopping, unless a sign forbids it
  4. Only if no vehicles are visible anywhere

Answer: After stopping, unless a sign forbids it

Traffic facing red may turn right except where a sign prohibits it, after first stopping.

Handbook p. 62 ↗
Before turning right on red, you must:
  1. Only slow down, not stop
  2. Wait for a green arrow
  3. Yield only to vehicles, not pedestrians
  4. Stop and yield to pedestrians in the crosswalk

Answer: Stop and yield to pedestrians in the crosswalk

When turning on red you must stop before the crosswalk and yield to pedestrians lawfully within it.

Handbook p. 62 ↗
A flashing red traffic light means you should:
  1. Slow down but not stop
  2. Stop, then treat it as a stop sign
  3. Treat it the same as flashing yellow
  4. Only stop if other traffic is present

Answer: Stop, then treat it as a stop sign

A flashing red light means you must stop and use the same procedure as a stop sign.

Handbook p. 63 ↗
In some metropolitan areas with horizontal traffic lights, which side is the red light on?
  1. The right
  2. The center
  3. The left
  4. There is no standard arrangement

Answer: The left

In horizontal signal arrangements, the red light is on the left, yellow in the middle, and green on the right.

Handbook p. 62 ↗
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