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

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

Understand the 20 mph Maximum Speed Limit Road Sign

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

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

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

The National Speed Limit Applies Sign (671) Explained

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

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

Prepare for the 20 mph speed limit zone ahead with this essential traffic sign.
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.
Master Critical Emergency Procedures and Avoid Test Traps on GB Roads.
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.
Master the Complex Rules of Sharing the Road with Motorcyclists and Avoid Common Test Traps.
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.
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.
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.
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