Driving Theory
British Road Signs and Traffic Sign Meanings

Obey the Maximum Speed 30 mph Traffic Sign

670V30 - Maximum speed 30 mph (48 km/h) British road sign meaning

The 'Maximum Speed 30 mph' traffic sign, coded 670V30, clearly indicates the highest speed you are legally permitted to travel on this stretch of road. This sign is crucial for both legal compliance and safe driving, requiring you to adjust your speed before reaching the point where the restriction begins. Always remember to combine the posted limit with the prevailing conditions, slowing down further if weather, traffic, or visibility demands it.

Interpreting the 30 mph Speed Limit Sign

This section explains the official meaning of the 30 mph maximum speed limit sign, crucial for your driving theory test revision. Mastering road sign interpretation ensures you recognise and comply with traffic rules for safe driving.

Definition of 670V30

Speed signs shape both legal compliance and safe driving technique. The number or symbol on the sign must be understood before the vehicle reaches the point where the rule begins, and the driver still has to adapt to weather, traffic, visibility, road surface, and stopping distance. A strong theory response is to slow progressively, keep good spacing, and avoid treating the posted value as a target. It is listed in the catalogue as code 670V30.

Meaning of 670V30

"Maximum speed 30 mph (48 km/h)" controls or explains a speed requirement. It tells the driver when a speed limit, speed zone, minimum speed, reminder, or enforcement-related condition applies.

Allowed actions for 670V30

Adjust speed before the sign takes effect.Keep a safe following distance for the speed and conditions.Use lower speeds where visibility, weather, traffic, or road surface requires it.Watch for repeaters, zone endings, and signs that change the applicable limit.

Prohibited actions for 670V30

Do not exceed a signed maximum speed limit.Do not drive below a signed minimum speed without a valid safety reason.Do not accelerate before the restriction has ended.Do not treat the posted number as safe when conditions require a lower speed.

670V30 - Maximum speed 30 mph (48 km/h) road sign FAQ

Get clear, practical answers to the most common questions about the 670V30 - Maximum speed 30 mph (48 km/h) road sign. Learn how the sign works, what rules it represents, and how it affects real driving situations. This FAQ strengthens your understanding and supports accurate decision making for the British driving theory exam in Great Britain.

What is the main purpose of the 670V30 Maximum Speed 30 mph sign?

The 670V30 sign's main purpose is to inform drivers that the maximum legal speed limit on the road ahead is 30 miles per hour (approximately 48 km/h). You must not exceed this speed at any time while the sign is in effect.

Do I always have to drive at exactly 30 mph when I see this sign?

No, the 30 mph is the maximum speed. You should always choose a speed that is safe for the current conditions, such as traffic, weather, visibility, and road surface. You might need to drive at a speed lower than 30 mph to maintain safety, especially if conditions are poor.

What are common mistakes learners make with the 30 mph speed limit sign in the theory test?

A common trap is treating the 30 mph as a target speed, rather than a maximum. Learners might also forget to check for repeater signs that indicate the limit continues, or fail to slow down sufficiently before the sign takes effect. It’s vital to understand that the posted speed is the upper limit, not necessarily the safe speed.

What should I do if I see a 670V30 sign at the end of a speed limit zone?

If you see a sign indicating the end of a restriction, or a change to a new speed limit, you should prepare to adjust your speed accordingly. For a 30 mph limit ending, you might see a sign showing a higher speed limit or the end of the restricted area symbol. Always ensure you know what the new applicable speed limit is.

Are there any exceptions to the 30 mph speed limit?

While the sign itself indicates a strict maximum, the 'Additional Notes' suggest that other factors, such as vehicle class, can influence the safe speed. Always combine the posted limit with your judgment of the conditions. If specific situations (like an emergency vehicle) require a temporary breach, safety and justification are key, but for learners, adhering to the posted limit is paramount.

670V30 - Maximum speed 30 mph (48 km/h) road sign image

A clear reference image of the 670V30 - Maximum speed 30 mph (48 km/h) road sign used in Great Britain.

670V30 - Maximum speed 30 mph (48 km/h) road sign

Other names for the 670V30 - Maximum speed 30 mph (48 km/h)

The 670V30 - Maximum speed 30 mph (48 km/h) road sign may also be known by these alternative names or terms.

Maximum speed 30 48670V30 speed limit signGreat Britain speed limit signspeed limit signs

Great Britain Speed Limit Signs road sign category

The 670V30 - Maximum speed 30 mph (48 km/h) road sign is part of the Great Britain Speed Limit Signs category, which groups together signs with similar rules and functions.

Master Speed Limit Signs Through Comparison

Comparing signs like 'Maximum speed 30 mph' with other speed limit signs helps sharpen your recognition and reduces exam errors. This focused theory test revision aids in recalling precise traffic sign meanings for better road awareness.

670V20 - Maximum speed 20 mph (32 km/h) road sign

Maximum speed 20 mph (32 km/h)

Understand the 20 mph Maximum Speed Limit Road Sign

Great Britain Speed Limit Signs670V20
670V40 - Maximum speed 40 mph (64 km/h) road sign

Maximum speed 40 mph (64 km/h)

Maximum Speed 40 mph Means Exactly That – Don't Exceed It!

Great Britain Speed Limit Signs670V40
670V50 - Maximum speed 50 mph (80 km/h) road sign

Maximum speed 50 mph (80 km/h)

Maximum Speed 50 mph (80 km/h) Traffic Sign Explained

Great Britain Speed Limit Signs670V50
670V60 - Maximum speed 60 mph (97 km/h) road sign

Maximum speed 60 mph (97 km/h)

Maximum Speed 60 MPH (97 km/h) Road Sign Explained

Great Britain Speed Limit Signs670V60
671 - National speed limit applies road sign

National speed limit applies

The National Speed Limit Applies Sign (671) Explained

Great Britain Speed Limit Signs671
672 - Minimum speed limit of 30 mph (48 km/h) road sign

Minimum speed limit of 30 mph (48 km/h)

Understand the 30 mph Minimum Speed Limit Sign (Code 672)

Great Britain Speed Limit Signs672
673 - End of 30 mph (48 km/h) minimum speed limit road sign

End of 30 mph (48 km/h) minimum speed limit

You've reached the end of the 30 mph minimum speed limit.

Great Britain Speed Limit Signs673
674 - Entrance to a 20 mph (32 km/h) per hour speed limit zone road sign

Entrance to a 20 mph (32 km/h) per hour speed limit zone

Prepare for the 20 mph speed limit zone ahead with this essential traffic sign.

Great Britain Speed Limit Signs674
Master complex traffic rules and road safety requirements through targeted study resources.

Explore curated explanations and practical examples to strengthen your visual recognition of essential Great Britain road signs. These supplementary materials provide the context needed to navigate junctions safely and pass your official DVSA theory test.

Practice set

Breakdowns & Motorways

Master Critical Emergency Procedures and Avoid Test Traps on GB Roads.

Article

Fitness to Drive and DVLA Reporting

As a learner driver, you have a legal obligation to ensure you are medically fit to operate a vehicle before every journey. This guide clarifies how to determine if your health condition must be reported to the DVLA, explaining the importance of compliance for both road safety and your legal standing. Mastering these rules is an essential part of your theory test preparation and your future as a responsible driver.

Practice set

Motorcyclists & Filtering

Master the Complex Rules of Sharing the Road with Motorcyclists and Avoid Common Test Traps.

Article

Mini-Roundabout Driving

Mini-roundabouts can be confusing, but mastering them is essential for your Great Britain driving theory test. This guide focuses on the most frequent errors learners encounter, such as incorrect priority assessment and improper signalling, providing clear advice aligned with the Highway Code. Learn the best practices to navigate these junctions confidently and safely.

Road sign

Minimum speed limit of 30 mph (48 km/h)

Speed signs shape both legal compliance and safe driving technique. The number or symbol on the sign must be understood before the vehicle reaches the point where the rule begins, and the driver still has to adapt to weather, traffic, visibility, road surface, and stopping distance. A strong theory response is to slow progressively, keep good spacing, and avoid treating the posted value as a target. It is listed in the catalogue as code 672.

Road sign

End of 30 mph (48 km/h) minimum speed limit

Speed signs shape both legal compliance and safe driving technique. The number or symbol on the sign must be understood before the vehicle reaches the point where the rule begins, and the driver still has to adapt to weather, traffic, visibility, road surface, and stopping distance. A strong theory response is to slow progressively, keep good spacing, and avoid treating the posted value as a target. It is listed in the catalogue as code 673.

Ready to Test Your Knowledge on Great Britain Road Signs?

After reviewing the full list of road signs, challenge yourself with practice questions focused specifically on sign recognition. Reinforce your learning and ensure you're fully prepared to identify and understand all traffic signs on the DVSA theory test.

Browse All GB Road Signs List
CTA Decorative Squares

Dive into British road sign knowledge

GB AM Moped Theory courseMotorcycle Theory GB courseGB Category B Theory courseGB Goods Vehicle Theory courseGB Passenger Vehicle Theory course879 Speed Camera British road sign878.1 Average speed check British road sign671 National speed limit applies British road sign675 End of 20 mph (32 km/h) zone British road signGreat Britain Sign Symbols British road sign categoryGreat Britain Warning Signs British road sign categoryGreat Britain Hazard Plates British road sign categoryGreat Britain Tourist Signs British road sign categoryGreat Britain Motorway Signs British road sign category670V20 Maximum speed 20 mph (32 km/h) British road sign670V30 Maximum speed 30 mph (48 km/h) British road sign670V40 Maximum speed 40 mph (64 km/h) British road sign670V50 Maximum speed 50 mph (80 km/h) British road sign670V60 Maximum speed 60 mph (97 km/h) British road signGreat Britain Direction Signs British road sign categoryGreat Britain Diversion Signs British road sign categoryGreat Britain Regulatory Signs British road sign categoryGreat Britain Low Bridge Signs British road sign categoryGreat Britain Motorway Signals British road sign categoryGreat Britain Speed Limit Signs British road sign categoryGreat Britain Information Signs British road sign categoryGreat Britain Bus and Cycle Signs British road sign categoryGreat Britain Level Crossing Signs British road sign category672 Minimum speed limit of 30 mph (48 km/h) British road signnational-speed-limits National speed limits British road signGreat Britain Pedestrian Zone Signs British road sign categoryGreat Britain Traffic Light Signals British road sign category673 End of 30 mph (48 km/h) minimum speed limit British road signGreat Britain Parking and Loading Signs British road sign categoryGreat Britain Roadworks and Temporary Signs British road sign category674 Entrance to a 20 mph (32 km/h) per hour speed limit zone British road sign880 Speed camera ahead with reminder of 30 mph (48 km/h) speed limit British road sign878 Area in which cameras are used to enforce the speed limit regulations British road signNI-SPEED-LIMITS Speed limits are in miles per hour (Northern Ireland only) British road sign