The B12 sign indicates a height limit, prohibiting vehicles or movements exceeding a specific clearance. This prohibitory sign is crucial for drivers to assess their vehicle's dimensions before proceeding, especially in areas with low bridges, tunnels, or overhangs. Always check for supplementary plates, as they might specify which vehicles or times the restriction applies to. If your vehicle is too tall, you must find an alternative, lawful route to avoid potential damage or obstruction.
Mastering the B12 Height Limit sign is crucial for safe French driving theory test revision. Understanding your vehicle's clearance prevents costly fines and ensures compliance with traffic rules.
Prohibitory signs are legally binding signs that prevent unsafe or unsuitable traffic movements. This sign may restrict entry, overtaking, turning, parking, stopping, horns, vehicle type, vehicle size, weight, or dangerous goods. Drivers should identify whether the restriction applies to them before entering the controlled area and should choose another lawful route if necessary. Official French sign code: B12.
"Height limit" tells drivers that a movement, access, vehicle category, stopping action, dimension, weight, or behaviour is prohibited. The restriction applies from the sign unless a plate or road layout states otherwise.
Get clear, practical answers to the most common questions about the B12 - Height limit 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 French driving theory exam in France.
The B12 sign signifies a restriction on the maximum height allowed for vehicles. It's a prohibitory sign, meaning you must not proceed if your vehicle's height, including any load, exceeds the limit indicated (often on a supplementary plate). You must be prepared to take a different route if your vehicle is too tall.
When you encounter the B12 sign, your first action is to check your vehicle's current height against the limit displayed, often on a sign below the B12. If your vehicle is taller than the indicated limit, you must stop and find an alternative route. Do not attempt to pass if you are too tall, as this can cause serious damage or accidents.
A common mistake is not paying attention to supplementary plates, which might specify the exact height limit or apply it only to certain types of vehicles or at specific times. Another trap is assuming a vehicle in front of you passed safely, so you will too; always verify the limit for your own vehicle.
If the B12 sign appears without a supplementary plate indicating a specific height, it generally means the restriction applies to all vehicles. However, in practice, the exact limit is usually specified on a plate or the physical restriction (like a bridge) itself. Always look for that information; if none is apparent, assume a very strict limit and proceed with extreme caution, or find another route.
The B12 sign itself indicates a height limit. Whether it applies to all vehicles depends on the supplementary plate. This plate might specify a general height limit or exempt certain categories of vehicles (e.g., passenger cars but not trucks). You must always read the entire sign assembly to know if the restriction applies to your vehicle.
A clear reference image of the B12 - Height limit road sign used in France.

The B12 - Height limit road sign may also be known by these alternative names or terms.
The B12 - Height limit road sign is part of the France Prohibitory Signs category, which groups together signs with similar rules and functions.
Reviewing related road signs like 'Height Limit' alongside similar prohibitory signs aids memory and reduces errors during your theory test revision. Master traffic sign comparison and improve your sign recognition skills for safer driving in France.

B0 'No Vehicles' Sign: Understanding This Important Prohibition

What does the B1 'No Entry' prohibitory sign mean for French drivers?

France's B10a 'Length Limit' Sign Prohibits Certain Vehicle Movements

Observe the B11 Width Limit sign to avoid restricted zones.

The B13 Weight Limit sign restricts vehicles exceeding a specified weight.

B13a: Understand the Axle Weight Limit Prohibitory Sign

The B14 'Speed Limit' Sign: Understanding and Obeying Prohibitory Restrictions

Master the B15 Sign: You Must Give Priority to Oncoming Traffic
Now that you've reviewed the full list of French road signs, enhance your understanding. Explore signs grouped by specific categories for deeper insights, test your recognition with practice questions, and solidify your knowledge for the Code de la route exam.
Browse All French Road Signs