Diagram 673V40 – End of Minimum Speed Limit of 40 mph

The Diagram 673V40 sign is a regulatory traffic sign indicating the end of a minimum speed limit of 40 mph. Featuring a blue circular background with the number “40” and a diagonal red slash, this sign informs drivers that they are now leaving a section of road where maintaining a minimum speed of 40 mph was mandatory.

This sign plays a crucial role in traffic regulation, road safety, and speed control, ensuring that vehicles can now adjust their speed based on road conditions, traffic flow, or lower speed limits ahead.

Key Features and Benefits

🚗 Indicates the End of a Mandatory Minimum Speed Limit

Signals that drivers are no longer required to maintain a minimum speed of 40 mph.
Allows vehicles to adjust their speed based on upcoming road conditions.
Improves traffic flow and driver awareness when transitioning to unrestricted speed zones.

⚠️ Improves Road Safety in High-Speed Areas

Typically placed at the end of a controlled-speed section on motorways or dual carriageways.
Ensures that vehicles can reduce speed safely where necessary.
Helps prevent accidents caused by sudden speed reductions in high-speed zones.

👀 Highly Visible and Easy to Recognize

Blue circular background with a diagonal red slash ensures instant recognition.
Made with retroreflective materials, ensuring visibility in all lighting conditions.
Typically positioned on the left side of the road or overhead on gantries in high-speed zones.

Where is the Diagram 673V40 Sign Used?

The Diagram 673V40 sign is installed in locations where a minimum speed limit previously applied but is no longer in effect. Common placements include:

Motorways and high-speed roads 🛣️ – Marking the transition to unrestricted speed zones.
Tunnels and bridges 🌉 – Where a minimum speed was required for safety or traffic efficiency.
Urban expressways and dual carriageways 🚗 – Where traffic merges with lower-speed roads.
Sections of road with variable speed limits ⚠️ – Ensuring smooth transitions between controlled and uncontrolled areas.

By clearly defining the end of the minimum speed restriction, this sign reduces confusion and enhances overall road safety.

Understanding Minimum Speed Limit Signs

The Diagram 673V40 sign is part of a series of minimum speed control signs used to regulate speed limits on motorways and high-speed roads. It works alongside:

✅ Diagram 673 (Minimum Speed Limit Sign) – Indicating the start of a minimum speed requirement.
✅ Diagram 670 (Speed Limit Sign) – Showing the maximum speed limit for a road.
✅ Diagram 671 (National Speed Limit Applies) – Indicating the return to standard UK speed regulations.

These signs ensure smooth traffic movement and maintain safe speeds on controlled routes.

Durability and Compliance

To ensure long-lasting performance and compliance with UK traffic regulations, our Diagram 673V40 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 highway agencies, motorway operators, and road safety authorities managing minimum speed zones.

Who Needs This Sign?

The Diagram 673V40 sign is widely used by:

✅ Highway agencies and road authorities – Managing controlled-speed sections of roads.
✅ Motorway and tunnel operators – Regulating minimum speeds in specific areas.
✅ Law enforcement agencies – Ensuring proper speed compliance.
✅ Construction and infrastructure developers – Implementing minimum speed regulations in road projects.

By placing this sign at strategic locations, authorities can ensure smooth traffic transitions and prevent speed-related incidents.

Summary

✔️ Marks the end of a 40 mph minimum speed limit 🚗
✔️ Allows vehicles to adjust their speed freely based on conditions 🛣️
✔️ Used on motorways, dual carriageways, and controlled-speed zones ⚠️
✔️ 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 reflective materials used are weather resistant and designed for outdoor application. The range consists of three classes including RA1, R2/RA2, and R3B/R3C. The outdoor service life for each class of material is as follows: