Diagram 559 – Risk of Falling or Fallen Rocks Ahead Warning Sign

The Diagram 559 sign is a warning traffic sign that alerts drivers to the possibility of falling or fallen rocks on the road ahead. Featuring a red-bordered triangular shape with a black rockfall symbol, this sign warns motorists to proceed with caution, reduce speed, and be prepared for obstacles on the road.

This sign is commonly used in hilly, mountainous, and coastal regions where rockslides and landslides pose a potential hazard to vehicles.

Key Features and Benefits

⚠️ Warns of Rockfall or Fallen Debris on the Road

• Alerts drivers that falling rocks or debris may be present ahead.
• Encourages motorists to reduce speed and remain vigilant.
• Helps prevent accidents caused by sudden rockfalls or road obstructions.

🚗 Enhances Road Safety in High-Risk Areas

• Typically placed in mountain passes, cliffside roads, and landslide-prone regions.
• Ensures drivers are prepared for road obstructions or loose debris.
• Reduces the risk of collisions with fallen rocks or swerving to avoid them.

👀 Highly Visible and Easy to Recognize

• Red-bordered triangular design conforms to UK warning sign standards.
• Black rockfall symbol ensures clear recognition.
• Made with retroreflective materials for visibility day and night.

Where is the Diagram 559 Sign Used?

The Diagram 559 sign is installed in locations where falling or fallen rocks pose a risk to vehicles. Common placements include:

• Mountain roads and high-altitude passes ⛰️ – Where rockfalls are common.
• Cliffside routes and coastal roads 🌊 – Informing drivers of erosion risks.
• Roads near quarries and excavation sites 🚜 – Indicating loose rock hazards.
• Landslide-prone areas 🌍 – Warning drivers of unstable slopes.
• Rural and scenic routes 🏞️ – Ensuring caution in natural, high-risk areas.

By clearly marking rockfall-prone zones, this sign helps prevent accidents and allows drivers to take necessary precautions.

Understanding Hazard Warning Signs

The Diagram 559 sign is part of a series of hazard warning signs designed to inform drivers about natural and environmental risks. It works alongside:

✅ Diagram 554 – “Fog Likely Ahead” (for areas prone to thick fog).
✅ Diagram 575 – “Accident Black Spot” (highlighting locations with frequent incidents).
✅ Diagram 557.1 – “Ice or Snow Risk” (used for roads subject to freezing conditions).

These signs improve driver awareness and promote road safety in challenging environments.

Durability and Compliance

To ensure long-lasting performance and compliance with UK traffic regulations, our Diagram 559 sign is made from high-quality, durable materials:

✔️ Retroreflective coating for night-time visibility 🌙
✔️ Weatherproof aluminum or composite material 🌧️
✔️ Rust and corrosion-resistant for outdoor durability 🏗️
✔️ Available in multiple sizes for different road environments 📏
✔️ Fully compliant with UK TSRGD regulations ✅

This sign is essential for local councils, highway authorities, and road safety planners managing rockfall-prone roads.

Who Needs This Sign?

The Diagram 559 sign is widely used by:

✅ Local councils and road authorities – Marking roads prone to falling rocks.
✅ Highway agencies – Ensuring driver safety on mountain and cliffside roads.
✅ Coastal and geological monitoring teams – Managing erosion risk areas.
✅ Construction and road maintenance teams – Indicating unstable ground near worksites.

By placing this sign at strategic locations, authorities can reduce accidents, protect road users, and enhance overall road safety.

Summary

✔️ Warns drivers of the risk of falling or fallen rocks ahead ⛰️
✔️ Encourages reduced speed and heightened caution ⚠️
✔️ Used on mountain roads, cliffside routes, and landslide-prone areas 🌍
✔️ Highly visible with reflective materials for night-time use 🌙
✔️ Fully compliant with UK road regulations (TSRGD) ✅

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Additional resources:

Driving rules

• The Highway Code
• Legal obligations of drivers and riders