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Mississippi driving lesson · Railroad Crossings & Traffic Signals

Traffic signal lights

A 3-minute lesson from the Mississippi 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
Railroad Crossings & Traffic Signals
Checkpoint questions
6
Source pages
37, 38

Signal lights control who moves, but they never cancel your duty to yield. Every time you go through an intersection, you must yield to pedestrians and to any traffic already in the intersection, even on green.

Steady red light
Solid red light

Know the rule

Solid red: make a complete stop and remain stopped until the light turns green.

Handbook p. 37 ↗

Know the rule

Exception: you may turn right on red, but first you must STOP COMPLETELY and yield to other traffic and pedestrians. No turn on red if a sign prohibits it. Only yielding without stopping first is illegal.

Handbook p. 37 ↗

Know the rule

Solid yellow: the light will soon turn red. Slow down and prepare to stop. A solid yellow arrow means the same thing.

Handbook p. 37 ↗

Know the rule

Solid green: you may go if it's safe, yielding to pedestrians and traffic already in the intersection. If you're turning left on a solid green, you must YIELD TO ONCOMING TRAFFIC.

Handbook p. 37 ↗
Steady green arrow
Green arrow

Know the rule

Green arrow: you may turn in the arrow's direction from the proper lane. Oncoming traffic has a red light, so it's a protected turn.

Handbook p. 37 ↗
Flashing yellow arrow
Flashing yellow arrow

Know the rule

Flashing yellow arrow: you may turn from the proper lane but must YIELD TO ONCOMING TRAFFIC. Oncoming traffic has a green light, so the turn is NOT protected.

Handbook p. 37 ↗

Signals for a straight-or-left lane

Signals for a straight-or-left lane
You seeWhat it means
Red light onlyStop: no left turn, no going straight
Red light + green arrowTurn left from the turn lane; don't go straight
Green light + green arrowTurn left or continue straight
Yellow arrowProtected turn is ending: use caution
Green light onlyGo straight; turn left only if clear, yielding
Yellow lightChanging to red: slow down, prepare to stop
Handbook p. 38 ↗
Red light with green left-turn arrow
Red light + green arrow: left turn only

Put it into practice

Your left-turn signal shows a flashing yellow arrow while oncoming cars have a green light. Pull forward from the proper lane and wait for a safe gap in oncoming traffic and pedestrians before turning.

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.

Before turning right on a solid red light, what must you do first?
  1. Signal and turn if no cars are coming
  2. Only check your mirrors, since stopping isn't required
  3. Come to a complete stop and yield to traffic and pedestrians
  4. Slow down and merge into the turn if the way looks clear

Answer: Come to a complete stop and yield to traffic and pedestrians

Before turning right on red, you must first stop completely — merely yielding without stopping is illegal.

Handbook p. 37 ↗
You have a solid green light and want to turn left. What must you do?
  1. Proceed only if no pedestrians are visible
  2. Wait for a green arrow to appear
  3. Yield to oncoming traffic before turning
  4. Turn immediately since green always means go

Answer: Yield to oncoming traffic before turning

A solid green light gives an unprotected left turn; you must yield to oncoming traffic before turning.

Handbook p. 37 ↗
What does a green arrow signal indicate about your left turn?
  1. It means the intersection is a four-way stop
  2. It only applies to right turns
  3. It is a protected turn
  4. It is unprotected and you must yield to oncoming traffic

Answer: It is a protected turn

A green arrow gives a protected turn because oncoming traffic faces a red light at the same time.

Handbook p. 37 ↗
A yellow flashing arrow allows a left turn, but what must you do?
  1. Treat it exactly like a red light and stop
  2. Yield to oncoming traffic, since it is an unprotected turn
  3. Proceed without yielding, since arrows are always protected
  4. Wait for the arrow to turn solid green first

Answer: Yield to oncoming traffic, since it is an unprotected turn

A yellow flashing arrow means oncoming traffic has a green light, so your turn is unprotected and you must yield.

Handbook p. 37 ↗
At an intersection with a solid green light, you may proceed without checking whether pedestrians are already in the intersection.
  1. True
  2. False

Answer: False

Even on a solid green light, you must yield to pedestrians and any traffic already in the intersection.

Handbook p. 37 ↗
A solid yellow arrow means the same thing as a solid yellow light: the signal is about to turn red.
  1. True
  2. False

Answer: True

A solid yellow arrow functions the same as a solid yellow light, signaling that red is coming.

Handbook p. 37 ↗
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