Road Narrows on Left Sign (High Speed) – Diagram 517L | Temporary UK Traffic Sign

🚧Road Narrows on Left Sign (High Speed) – Diagram 517L | Temporary UK Traffic Sign

The Road Narrows on Left Sign (High Speed) – Diagram 517L is a temporary UK traffic sign used to warn drivers that the road ahead will become narrower on the left-hand side. This sign is crucial for ensuring that motorists adjust their speed and lane positioning to safely navigate constricted road sections.

With its high-visibility triangular design, red border, and black narrowing road symbol, this sign provides clear and immediate guidance, helping drivers avoid sudden lane shifts or accidents. Fully TSRGD-compliant, it is widely used in roadworks, bridges, rural roads, and temporary lane reductions where road width is temporarily restricted.

⚠️ Prevents Lane Encroachment & Improves Road Safety

This Road Narrows on Left Sign (High Speed) – Diagram 517L plays a crucial role in minimizing risks in narrowing road conditions by ensuring that drivers are prepared to maintain safe lane discipline.

✅ Warns drivers that the road narrows on the left ahead
✅ Encourages careful lane positioning and speed reduction
✅ Prevents last-minute lane changes and potential side collisions
✅ Improves traffic flow by reducing congestion in narrowing zones

By providing an early warning, this sign helps create safer driving conditions, ensuring that vehicles stay within their lane and approach narrowing sections cautiously.

📏 Highly Visible, Durable & Weather-Resistant

Designed for temporary deployment in roadworks, lane adjustments, and construction areas, this official UK road sign ensures maximum visibility and durability in all conditions.

✔️ Bold triangular shape with a clear narrowing road symbol for instant recognition
✔️ Retroreflective surface ensures high visibility in low-light and night-time conditions
✔️ Weatherproof and corrosion-resistant materials for long-lasting outdoor use
✔️ TSRGD-compliant, making it suitable for official road narrowing and traffic management

These features ensure that motorists can quickly recognize and respond to lane width changes, preventing panic braking or sudden swerving.

🛠 Quick Installation & Portable Design

The Road Narrows on Left Sign (Diagram 517L) is lightweight and easy to install, making it ideal for temporary traffic management and lane narrowing zones.

✔️ Portable and quick to set up for roadwork teams and traffic control crews
✔️ Compatible with standard traffic sign frames and stands
✔️ Available in multiple sizes to suit different road conditions and visibility needs
✔️ Ideal for roadworks, narrow bridges, and temporary lane reductions

With fast deployment and repositioning, this sign ensures efficient traffic control and helps drivers prepare for road narrowing on the left.

✅ Why Choose Road Narrows on Left Sign (High Speed) – Diagram 517L?

✔️ Official UK traffic sign for left-side road narrowing
✔️ Highly visible & reflective for enhanced driver awareness
✔️ Weatherproof & durable for outdoor use in all conditions
✔️ Lightweight & portable for quick setup and removal
✔️ Prevents confusion & ensures smooth traffic flow in narrowing areas
✔️ Fully compliant with UK TSRGD temporary traffic sign regulations

📌 Summary

• Road Narrows on Left Sign – Diagram 517L is a temporary UK traffic sign warning drivers of a narrowing road ahead on the left.
• Essential for roadworks, lane adjustments, and bridge crossings, ensuring clear guidance for motorists.
• Highly visible, lightweight, and weather-resistant, ensuring long-term effectiveness in all conditions.
• Easy to set up and relocate, making it ideal for construction sites and temporary traffic control zones.
• Manufactured to TSRGD standards, ensuring full compliance with UK road safety regulations.

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Additional resources:

Driving rules

• The Highway Code
• Legal obligations of drivers and riders