Hazard signs: what do the triangles mean?

The red-bordered triangle is used for many hazard signs. Its symbol identifies the risk, and drivers must adapt their driving without assuming that a fixed speed applies.

Warning of a hazard

Hazard signs warn of a risk that is present or may arise along the road. The triangular shape and red border are immediate clues, but the picture inside specifies the hazard: a bend, junction, crossing, slippery surface, roadworks or another recognised situation. The sign gives advance warning, so the distance to the hazard and any supplementary plates may matter.

When you see the sign, look at the road, reduce your speed if needed and leave yourself room to react. Do not read it as an automatic instruction to brake sharply or as a numerical speed limit that applies in every case. Your driving should reflect the road layout, traffic, visibility and grip. A supplementary plate may show the distance, length or course of the hazard; read the whole sign, not just the triangle.

• Identify the symbol inside the triangle and the direction of the hazard.
• Read any plates showing its distance or length.
• Adjust your speed and position gradually and safely.

Signs and how to respond

A hazard sign does not remove the need to watch the road. On a bend, for example, visibility may be limited and the road surface may change; near a crossing, pedestrians or cyclists may appear. Keep a suitable distance and remember that other road users may not have seen the sign or may behave unpredictably.

The shapes and symbols are described in the implementing regulations for the Italian Highway Code. To study them, compare the official illustrations and take care with similar symbols. A temporary sign may be placed before roadworks and paired with temporary speed limits; pay close attention to the conditions on the road.

Learning the symbols

A triangle does not always point to a hazard that is immediately visible; it often gives advance warning of a situation for which you need to prepare. Look for plates showing the distance or course of the hazard, and check whether it affects only one lane. In rain or darkness, the risk may be harder to spot and stopping distances increase. Avoid sudden steering: slow down gradually and maintain your line.

Quiz Patente Ufficiale helps you study signs by chapter, take timed quizzes and review your incorrect answers.