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Louisiana driving lesson · Signs, Signals & Markings

Warning signs

A 2-minute lesson from the Louisiana course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
2 minutes
Course unit
Signs, Signals & Markings
Checkpoint questions
5
Source pages
30, 31

Warning signs tell you about possible danger ahead, such as a curve, a merge or a crossing, so you can slow down and be ready to stop. Learn to read the symbol at a glance.

Know the rule

Warning signs are usually yellow with black letters or symbols and diamond shaped. Some, such as school zone, school crossing and pedestrian crossing signs, may be fluorescent yellow.

Handbook p. 30 ↗
Crossroad
Cross road ahead
T intersection
T-intersection ahead
Y intersection
Y-intersection ahead
Sharp turn right
Sharp right turn
Divided highway begins
Divided highway begins
Road narrows
Lane ends
Merge
Merging traffic
School zone
School crossing
Slippery when wet
Slippery when wet
Stop ahead
Stop sign ahead
No passing zone
No passing zone
Low clearance
Low clearance

Other warning signs to know:

  • Side road, angled side road, road entering curve, added lane
  • Curvy road, right curve, series of turns, winding road, divided highway ends
  • Narrow bridge or underpass, uneven grade crossing
  • Share the road with bicycles, bicycle crossing, deer crossing, emergency vehicle crossing
  • Traffic signal ahead, yield sign ahead
  • Advisory speed for a curve, ramp or exit
Handbook p. 31 ↗

Put it into practice

A yellow diamond shows a red octagon with an arrow above it. There's a stop sign ahead you can't see yet, maybe around a curve. Ease off the gas now so you can stop smoothly.

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.

Warning signs, such as those alerting drivers to a curve ahead, are typically:
  1. Red, octagon-shaped
  2. Yellow, diamond-shaped, with black symbols
  3. Blue, rectangular
  4. Orange, round

Answer: Yellow, diamond-shaped, with black symbols

Standard warning signs use a yellow diamond with black lettering or symbols.

Handbook p. 30 ↗
A yellow diamond sign showing a car with wavy skid marks behind it means:
  1. Winding road ahead
  2. Loose gravel ahead
  3. Sharp curve ahead
  4. Slippery when wet

Answer: Slippery when wet

The car-with-skid-marks symbol is the Slippery When Wet warning sign.

Handbook p. 31 ↗
A yellow diamond warning sign shows a black 'T' shape. What is ahead?
  1. A side road
  2. A Y-intersection
  3. A T-intersection
  4. A cross road

Answer: A T-intersection

The T symbol warns of a T-intersection ahead, where your road ends at a crossing road.

Handbook p. 30 ↗
A yellow diamond sign showing a stop sign with an arrow above it warns that a stop sign is ahead.
  1. True
  2. False

Answer: True

The Stop Sign Ahead warning sign alerts you before you can see the stop sign itself.

Handbook p. 31 ↗
A yellow diamond sign shows 13'-6" with arrows pointing up and down. What does it warn about?
  1. Minimum following distance
  2. Low clearance ahead
  3. Maximum truck length allowed
  4. A narrow bridge width

Answer: Low clearance ahead

The Low Clearance sign shows the height available under an overpass or structure ahead.

Handbook p. 31 ↗
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