The B21d sign is a mandatory traffic sign in France, instructing you to proceed straight ahead or turn right. As a mandatory sign, it requires strict compliance, unlike informational signs. You must follow the direction indicated by the sign, ensuring you read it early and react appropriately to maintain safe traffic flow.
Mastering the French 'Go ahead or turn right' sign (B21d) is crucial for your theory test revision. This mandatory instruction clarifies your required path, ensuring you understand French traffic rules for safe navigation.
Mandatory signs tell road users what they must do rather than what they must avoid. This sign can control direction of travel, required lanes, special routes for buses or trams, pedestrian or cycle facilities, snow chains, or minimum speed. A learner should read the sign early, confirm whether it applies to their vehicle, and follow the required movement smoothly. Official French sign code: B21d.
"Go ahead or turn right" gives a positive instruction that the driver or named road user must follow. It may require a direction, lane, path, minimum speed, equipment, or reserved route.
Get clear, practical answers to the most common questions about the B21d - Go ahead or turn right 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 B21d sign means you must proceed straight ahead or turn right. It's a positive instruction, meaning you have no choice but to follow the direction shown. This sign is part of the mandatory signs group, so it's crucial to obey it.
When you see the B21d sign, you must follow the indicated direction, which is either straight ahead or to the right. Always check your mirrors, signal your intention, and manoeuvre smoothly to comply with the instruction. The obligation starts from the sign or indicated road markings.
A common mistake is confusing this mandatory sign with an information sign, thinking they have a choice. Another error is reacting late, leading to sudden or incorrect manoeuvres. The theory test will check if you understand that this sign requires a specific action.
No, absolutely not. The B21d sign specifically mandates that you must either go straight ahead or turn right. Turning left when presented with this sign is a violation and a common trap in the theory exam, as it directly contradicts the mandatory instruction.
Generally, yes, but sometimes mandatory signs like B21d can be supplemented with a smaller panel indicating specific road users (e.g., for buses only). If no such panel is present, it applies to all vehicles. Always check for such supplementary information or road markings.
A clear reference image of the B21d - Go ahead or turn right road sign used in France.

The B21d - Go ahead or turn right road sign may also be known by these alternative names or terms.
The B21d - Go ahead or turn right road sign is part of the France Mandatory Signs category, which groups together signs with similar rules and functions.
Comparing 'Go ahead or turn right' (B21d) with similar mandatory signs in France sharpens your recognition skills for the theory test. This traffic sign comparison helps solidify your understanding of directional requirements and reduces errors during your licence process revision.

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B21a 'Keep Right' sign: You must stay to the right.

The B21b 'Ahead Only' Sign: A Mandatory Direction You Must Follow

B21c: Mandatory Turn Right Ahead Sign

The B21c 'Turn Left Ahead' Sign: Your Mandatory Direction

The B21d Sign: You Must Go Ahead or Turn Left!
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Mandatory signs tell road users what they must do rather than what they must avoid. This sign can control direction of travel, required lanes, special routes for buses or trams, pedestrian or cycle facilities, snow chains, or minimum speed. A learner should read the sign early, confirm whether it applies to their vehicle, and follow the required movement smoothly. Official French sign code: B21d.
Mandatory signs tell road users what they must do rather than what they must avoid. This sign can control direction of travel, required lanes, special routes for buses or trams, pedestrian or cycle facilities, snow chains, or minimum speed. A learner should read the sign early, confirm whether it applies to their vehicle, and follow the required movement smoothly. Official French sign code: B21b.
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