This regulatory road sign, coded 629A, is a strict prohibition designed to control traffic flow and safety on Great Britain's roads. It explicitly forbids vehicles that exceed a certain width, which is indicated on the sign itself in both imperial and metric measurements. You must always obey this sign, as it applies from the point where it is displayed or indicated by road markings, and ignoring it can lead to significant risks or penalties. Always check for any supplementary plates that might detail specific times or vehicle types that are exempt from the restriction before proceeding.
This crucial regulatory sign (629A) restricts vehicles of a specific width, demanding your careful attention to avoid violations. Master its interpretation for effective theory test revision and safe driving.
This regulatory sign is part of the legal control of the road. It may require a driver to stop, give way, keep to a direction, avoid a movement, stay out of a restricted area, or respect a vehicle-specific rule. In practice, the sign should be read with the stop line, lane markings, road layout, and any supplementary plates so the instruction is obeyed before the controlled point. It is listed in the catalogue as code 629A.
"Vehicles exceeding width indicated prohibited (imperial and metric)" gives a binding instruction, restriction, or prohibition. The driver must understand who it applies to, where it starts, and whether any exception is shown before continuing.
Get clear, practical answers to the most common questions about the 629A - Vehicles exceeding width indicated prohibited (imperial and metric) 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 629A sign means that any vehicle whose width, including any load, is greater than the measurement shown on the sign is not allowed to proceed. This is a mandatory instruction, and you must ensure your vehicle's width complies with the stated limit.
You need to know your vehicle's exact width, including any mirrors, aerials, or widest parts of your load. Compare this measurement to the dimensions shown on the 629A sign. If your vehicle is wider than the indicated limit, you must not pass this sign.
Sometimes, supplementary plates beneath the main 629A sign might specify exceptions. These could relate to certain times of day, specific types of vehicles (like emergency services), or particular purposes. If no exceptions are shown, the prohibition applies to all vehicles exceeding the stated width.
If your vehicle is too wide for the restriction indicated by the 629A sign, you must find an alternative, legal route. Do not attempt to proceed if your vehicle exceeds the width limit, as this could be dangerous or lead to damage. Planning your route in advance is key, especially if you are driving a wider vehicle.
A common trap is assuming the sign is advisory or that other drivers ignoring it means you can too. This is a binding prohibition, and you must comply. Another trap is not checking for supplementary plates, which may contain crucial information about exceptions or the precise location where the restriction starts.
A clear reference image of the 629A - Vehicles exceeding width indicated prohibited (imperial and metric) road sign used in Great Britain.

The 629A - Vehicles exceeding width indicated prohibited (imperial and metric) road sign may also be known by these alternative names or terms.
The 629A - Vehicles exceeding width indicated prohibited (imperial and metric) road sign is part of the Great Britain Regulatory Signs category, which groups together signs with similar rules and functions.
Mastering road signs involves more than memorisation; comparing similar signs, such as variations of width restrictions, enhances your sign recognition and reduces errors during your theory test revision. This comparison helps solidify your understanding of specific traffic sign meanings for effective exam preparation.

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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.
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