What does a triangular sign mean?

The triangular shape signals a hazard ahead — something the driver needs to be ready for. The face (speed bump, lane narrowing, pedestrian crossing, works) explains what the hazard is. Prohibitions and mandatory instructions use round signs; information uses rectangular ones.

How far ahead of the works should the sign go?

Far enough for a driver to see it and slow down, and that distance grows with the speed limit and falls with visibility. On public roads, follow the marking rules of the responsible authority.

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Triangular Signs

Triangular signs carry hazard warnings: works ahead, speed bump, lane narrowing from the right or left, pedestrian crossing and two-way traffic faces are listed at 380 mm in single and double sided versions.

Faces and Single or Double Sided

The triangular shape itself tells a driver there is a hazard ahead; the face explains what it is. We list works ahead, general caution, speed bump, lane narrowing from both sides, lane narrowing from the right or left, pedestrian crossing and two-way traffic.

Single sided signs suit locations approached from one direction; double sided signs are for stretches that must be read from both. Double sided production removes the need for a second sign on temporary site boards mounted on feet or posts.

Works ahead and general caution — double sided, site approaches
Speed bump — warning ahead of traffic calming
Lane narrowing from right, left or both sides — taper layouts
Pedestrian crossing and two-way traffic — pedestrian and opposing flow
380 mm triangular warning plate — compact site size

Where and How They Are Used

Warning signs are the first link in a work-zone layout: the driver sees the sign, then meets the lane tapered by cones and barriers. The sign therefore has to sit far enough ahead of the working area for the driver to react.

They also serve as permanent warnings on construction sites, factory yards, campuses and private roads. Signs mount on posts or feet, and where night visibility matters they are planned alongside solar LED signs and flashers.

Frequently Asked Questions

What does a triangular sign mean?
The triangular shape signals a hazard ahead — something the driver needs to be ready for. The face (speed bump, lane narrowing, pedestrian crossing, works) explains what the hazard is. Prohibitions and mandatory instructions use round signs; information uses rectangular ones.
Single or double sided?
If the sign is approached from one direction only, single sided is enough. Where it must be read from both directions — for example a temporary sign on a foot in a two-way road — double sided production covers both from a single unit.
How far ahead of the works should the sign go?
Far enough for a driver to see it and slow down, and that distance grows with the speed limit and falls with visibility. On public roads, follow the marking rules of the responsible authority.