Cautionary Speed

Reference Table

Core Sign Facts

Structured metadata for quick AI parsing and theory-test recall.

Core facts about Cautionary Speed
Sign name	Cautionary Speed
Sign type	Supplementary Plates
Expected in DTT?	Yes. This sign is commonly covered in Irish driving theory test preparation.
Action required	Advisory speed recommendation for safe navigation of specific hazards based on road engineering assessment and safety considerations. Cautionary speeds provide guidance for safe passage while allowing driver judgment in varying conditions including weather, vehicle type, and traffic circumstances. Advisory nature distinguishes from mandatory speed limits while providing essential safety guidance.
Appearance	Rectangular / White and black
Typical location	Cautionary speed supplementary plates positioned throughout Ireland at hazardous locations including sharp bends on mountain roads, approach sections to narrow bridges, areas with limited visibility, coastal routes with challenging conditions, and other locations where advisory speed guidance enhances safety without imposing mandatory speed restrictions. Common on tourist routes and challenging rural roads.

This page explains what the Cautionary Speed sign means, where it is typically found, and how drivers should respond in Ireland. It also connects you to closely related signs so you can compare similar road situations and build stronger theory-test recall.

What Does This Sign Mean?

Advisory safe speed for hazard section.

Key Points:

🐢 Recommends a safe speed for the hazard ahead (e.g., a sharp bend).

🚗 This is an advisory speed, not a mandatory limit.

⚠️ You should slow to this speed for safety.

More Supplementary Plates Signs

24-Hour Operation

Restriction or rule applies continuously day and night.

Another Train Coming

A second train may arrive after the first has passed.

Both Ways

Hazard or movement affecting traffic in both directions.

Concealed Entrance

Hidden access where vehicles may emerge unexpectedly.

Cycle Network Arrow

Direction of designated cycle network route.

Direction - Left

Clarifies a left-hand direction for main sign.

Complete Guide to This Sign

Where You'll Find This Sign

Cautionary speed supplementary plates positioned throughout Ireland at hazardous locations including sharp bends on mountain roads, approach sections to narrow bridges, areas with limited visibility, coastal routes with challenging conditions, and other locations where advisory speed guidance enhances safety without imposing mandatory speed restrictions.

Common on tourist routes and challenging rural roads.

What This Means for Drivers

Advisory speed recommendation for safe navigation of specific hazards based on road engineering assessment and safety considerations.

Cautionary speeds provide guidance for safe passage while allowing driver judgment in varying conditions including weather, vehicle type, and traffic circumstances.

Advisory nature distinguishes from mandatory speed limits while providing essential safety guidance.

Penalties & Legal Consequences

No direct penalties apply to cautionary speed advisories as they represent guidance rather than mandatory limits.

However, driving at inappropriate speeds for conditions despite advisory guidance may contribute to dangerous driving charges: €160-€2,000 for dangerous driving, enhanced penalties if accidents result from ignoring safety guidance, potential liability implications for insurance coverage.

Appears in Driving Test?

Cautionary speed recognition demonstrates understanding of advisory safety guidance and appropriate speed selection for challenging conditions essential for safe rural and mountainous driving.

Theory test questions address speed selection techniques, hazard assessment skills, and appropriate responses to advisory guidance.

Understanding cautionary speeds indicates readiness for complex driving environments requiring enhanced judgment and demonstrates comprehensive understanding of speed management essential for safe navigation throughout Ireland's diverse road network.

Frequently Asked Questions about the Cautionary Speed Sign

What does the Cautionary Speed sign mean in Ireland?

In Ireland, the Cautionary Speed sign indicates: Advisory safe speed for hazard section. Understanding this is crucial for safe driving and passing your DTT.

What type of sign is the Cautionary Speed?

The "Cautionary Speed" is officially classified as part of the SUPPLEMENTARY group in Ireland. Like other signs of this type, it alerts drivers to specific rules, hazards, or information they must immediately observe.

Will the Cautionary Speed sign appear on the Irish Theory Test?

Yes, you should expect the Cautionary Speed sign to appear on your Irish Driving Theory Test (DTT). You must be able to identify it as a SUPPLEMENTARY and know what it requires from you as a driver.

●Live App Updates

Master Irish Signs on Mobile

Get instant access to 400+ signs, interactive quizzes, and progress tracking. Download the free app today!

Cautionary Speed

Reference Table

Core Sign Facts

Structured metadata for quick AI parsing and theory-test recall.

Core facts about Cautionary Speed
Sign name	Cautionary Speed
Sign type	Supplementary Plates
Expected in DTT?	Yes. This sign is commonly covered in Irish driving theory test preparation.
Action required	Advisory speed recommendation for safe navigation of specific hazards based on road engineering assessment and safety considerations. Cautionary speeds provide guidance for safe passage while allowing driver judgment in varying conditions including weather, vehicle type, and traffic circumstances. Advisory nature distinguishes from mandatory speed limits while providing essential safety guidance.
Appearance	Rectangular / White and black
Typical location	Cautionary speed supplementary plates positioned throughout Ireland at hazardous locations including sharp bends on mountain roads, approach sections to narrow bridges, areas with limited visibility, coastal routes with challenging conditions, and other locations where advisory speed guidance enhances safety without imposing mandatory speed restrictions. Common on tourist routes and challenging rural roads.