Road Narrows on Left Sign – Diagram 517L | Permanent UK Traffic Sign

⚠️ Road Narrows on Left Sign – Diagram 517L | Permanent UK Traffic Sign

It is an official UK warning sign used to notify drivers that the road ahead will narrow from the left-hand side. This sign is critical for road safety and traffic management, ensuring that motorists reduce speed, adjust their positioning, and prepare for a potential reduction in lane width. It is fully TSRGD-compliant and is commonly installed on rural roads, highways, and urban areas where lane width decreases due to road design, construction, or natural obstructions.

📍 Where is the Road Narrows on Left Sign Used?

This sign is placed in locations where lane narrowing on the left-hand side could impact traffic flow and safety:

• Rural roads with natural obstructions reducing road width.
• Highways with lane reductions due to road layout changes.
• Urban areas where buildings or structures encroach on road space.
• Roadworks where temporary narrowing occurs on the left side.
• Bridges or tunnels where lane width decreases.

By warning drivers of the upcoming road change, this sign helps prevent sudden braking, lane departure incidents, and side-swipe collisions.

⚠️ Ensuring Safe Navigation on Narrow Roads

The Road Narrows on Left Sign (Diagram 517L) improves road safety by:

✅ Alerting drivers to an upcoming narrowing on the left-hand side.
✅ Encouraging slower speeds and increased awareness of road positioning.
✅ Preventing last-minute lane changes and dangerous overtaking.
✅ Ensuring compliance with UK road safety regulations.

With its clear triangular warning design, featuring a narrowing road symbol, this sign provides instant recognition for motorists approaching a lane reduction.

📏 Highly Visible, Durable & Weather-Resistant

This official UK warning sign is designed for long-term outdoor use, ensuring maximum visibility and resilience in all conditions.

✔️ Retroreflective surface for high visibility in both day and night conditions.
✔️ Weatherproof and corrosion-resistant materials for long-lasting durability.
✔️ TSRGD-compliant – fully meets UK road safety regulations.

🛠 Easy Installation & Multiple Size Options

The Road Narrows on Left Sign (Diagram 517L) is available in various standard UK road sign sizes and materials, making it suitable for different road environments.

✔️ Pre-drilled holes for quick and secure installation.
✔️ Multiple size options for highways, rural roads, and urban areas.
✔️ Compatible with post-mounting systems for secure setup.

✅ Why Choose This Sign?

✔️ Official UK warning sign for road narrowing on the left.
✔️ Highly visible & reflective for enhanced safety.
✔️ Weatherproof & durable for outdoor use.
✔️ Prevents confusion & improves driver awareness.
✔️ Fully compliant with TSRGD UK traffic regulations.

📌 Summary

• Road Narrows on Left Sign (Diagram 517L) alerts drivers to an upcoming lane reduction.
• Encourages caution, lower speeds, and safer road positioning.
• Highly visible, durable, and weatherproof for long-term outdoor use.
• Ideal for rural roads, highways, and areas with restricted lane width.
• Fully compliant with TSRGD UK traffic sign regulations.

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Additional resources:

Driving rules

• The Highway Code
• Legal obligations of drivers and riders