Where:
Displayed on any public road where there is a height restriction ahead, typically before low bridges, tunnels, overhead structures, or overhead power lines etc.

Purpose:
To warn drivers that vehicles exceeding a certain height (as indicated in metres on the sign) cannot safely pass under the obstruction ahead.
This helps prevent damage to vehicles, infrastructure, and ensures the safety of all road users.

Action:
Before proceeding, check the height of your vehicle, including any load.
If your vehicle or load exceeds the indicated height, you must not continue on that road.
Use an alternative route that can safely accommodate the height of your vehicle.
Always pay attention to advance warning signs that may appear before the actual restriction to give you time to divert.