Warning sign · W320
Height restriction ahead sign (W320)
A height restriction applies ahead.
What does the height restriction ahead sign mean?
A height restriction applies ahead.
What should you do?
Check your vehicle and load height before proceeding.
| Sign code | W320 |
|---|---|
| Sign group | Warning signs |
| Applies to | All learner codes (1, 2 and 3) |
| Test section | Road signs and markings |
How to recognise the height restriction ahead sign
A triangle with a height figure above a structure.
Where you will see it
Ahead of a structure with limited height.
What to do when you see it, step by step
- If your vehicle or load is taller than the figure, find another route before you reach it.
The common mistake
The red-bordered height sign (R204) is the rule; this triangle only prepares you.
Why this sign matters
Hitting a structure with a tall load can bring down the structure and injure people. The warning gives you a chance to avoid the problem.
About warning signs
Warning signs tell you about a hazard ahead so you can slow down and prepare. They are red-bordered triangles. The K53 learner's test asks you to recognise signs like the height restriction ahead sign (W320) and choose the correct response, so learn both the picture and the action.
How to answer a test question about this sign
- Look at the shape and colour first. They tell you the group: warning signs for this one.
- Recall what the sign asks of you: check your vehicle and load height before proceeding.
- Remove the options that describe a different group of sign, then choose the response that matches the action.
Want the full explanation? Read the chapter Warning signs and temporary road controls.
Signs it is often confused with
Learners mix up signs that look or sound similar. Compare the height restriction ahead sign with these:
Length restriction ahead (W321)A triangle with a length figure beside a vehicle.
Crossroad ahead (W101)A triangle with a plain cross showing a road crossing yours.
T-junction ahead (W104)A triangle showing your road ending against a road that runs across it.Test yourself: Height restriction ahead sign questions
1 What does this sign mean?
- The road narrows from the left ahead.
- An axle mass restriction applies as shown.
- A height restriction applies ahead.
Show the answer
Answer C: A height restriction applies ahead.
Check your vehicle and load height before proceeding.
Memory tip: W320 · Height restriction ahead
All vehicle codes
2 Which response fits this sign?
- Check traffic and adjust position safely as the road narrows.
- Check your vehicle and load height before proceeding.
- Check the axle load before proceeding beyond the sign.
Show the answer
Answer B: Check your vehicle and load height before proceeding.
Height restriction ahead: A height restriction applies ahead.
Memory tip: Check your vehicle and load height before proceeding.
All vehicle codes
Height restriction ahead sign: quick questions
What does the height restriction ahead sign (W320) mean?
A height restriction applies ahead.
What should you do at the height restriction ahead sign?
If your vehicle or load is taller than the figure, find another route before you reach it.
Where will you see the height restriction ahead sign?
Ahead of a structure with limited height.
What is the common mistake with the height restriction ahead sign?
The red-bordered height sign (R204) is the rule; this triangle only prepares you.
Sign artwork: Southern African Development Community (SADC), public domain. AceK53 is an independent study aid. Always confirm test requirements with your driving licence testing centre.