Driving Theory
French Road Signs and Traffic Sign Meanings

B21d: You Must Go Ahead or Turn Right

B21d - Go ahead or turn right French road sign meaning

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.

Interpreting the B21d: Go Ahead or Turn Right Sign

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.

Definition of 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: B21d.

Meaning of 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.

Allowed actions for B21d

Follow the required direction, lane, path, or equipment rule from the sign.Check mirrors and signal before moving to comply with the instruction.Use another route if your vehicle cannot legally follow the mandatory instruction.Keep enough space around road users who are directed into the same facility.

Prohibited actions for B21d

Do not choose a different movement when the sign requires a specific direction or facility.Do not enter a mandatory lane or path unless your road-user category is included.Do not ignore a minimum speed or equipment requirement when it applies.Do not make a sudden manoeuvre after noticing the sign late.

B21d - Go ahead or turn right road sign FAQ

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.

What does the B21d 'Go Ahead or Turn Right' sign mean for drivers 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.

What action should I take when I see the B21d mandatory sign?

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.

What are common mistakes learners make with the B21d sign in the theory exam?

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.

Can I choose to turn left if I see the B21d sign?

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.

Does the B21d sign apply to all vehicles?

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.

B21d - Go ahead or turn right road sign image

A clear reference image of the B21d - Go ahead or turn right road sign used in France.

B21d - Go ahead or turn right road sign

Other names for the B21d - Go ahead or turn right

The B21d - Go ahead or turn right road sign may also be known by these alternative names or terms.

Go ahead or turn rightGo or turn rightB21d mandatory signFrance mandatory signmandatory signs

France Mandatory Signs road sign category

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.

Reinforce Your Understanding with Similar Signs

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.

B21-1 - Turn right road sign

Turn right

The B21-1 'Turn Right' sign: your mandatory direction in France.

France Mandatory SignsB21-1
B21-2 - Turn left road sign

Turn left

Obey the 'Turn Left' Mandatory Sign (B21-2) in France

France Mandatory SignsB21-2
B21a - Keep left road sign

Keep left

Mandatory 'Keep Left' Sign: Your Essential Guide

France Mandatory SignsB21a
B21a - Keep right road sign

Keep right

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

France Mandatory SignsB21a
B21b - Ahead only road sign

Ahead only

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

France Mandatory SignsB21b
B21c - Turn right ahead road sign

Turn right ahead

B21c: Mandatory Turn Right Ahead Sign

France Mandatory SignsB21c
B21c - Turn left ahead road sign

Turn left ahead

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

France Mandatory SignsB21c
B21d - Go ahead or turn left road sign

Go ahead or turn left

The B21d Sign: You Must Go Ahead or Turn Left!

France Mandatory SignsB21d

Ready to Deep Dive into French Road Sign Categories and Meanings?

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
CTA Decorative Squares

Dive into French road sign knowledge

French HGV Theory courseFrench Motorcycle Theory courseFrench Category B Theory courseFrench D Category Theory courseB21a Keep left French road signCategory AM French Theory courseB21-2 Turn left French road signB21a Keep right French road signB21b Ahead only French road signB21-1 Turn right French road signB21c Turn left ahead French road signB21c Turn right ahead French road signB21e Turn left or right French road signB21d Go ahead or turn left French road signB21d Go ahead or turn right French road signFrance Warning Signs French road sign categoryFrance Service Signs French road sign categoryFrance Extent Plates French road sign categoryFrance Priority Signs French road sign categoryFrance Location Signs French road sign categoryFrance Parking Plates French road sign categoryFrance Mandatory Signs French road sign categoryFrance Distance Plates French road sign categoryFrance Direction Plates French road sign categoryFrance Prohibitory Signs French road sign categoryFrance Information Signs French road sign categoryFrance Stop Ahead Plates French road sign categoryFrance Indication Plates French road sign categoryFrance Road Number Plates French road sign categoryFrance Lane Section Plates French road sign categoryFrance Priority Route Plates French road sign categoryFrance Railway Crossing Signs French road sign categoryFrance Temporary Warning Signs French road sign categoryFrance Vehicle Category Plates French road sign categoryFrance Bicycle-Specific Plates French road sign categoryFrance End of Restriction Signs French road sign categoryFrance Zonal Prescription Signs French road sign categoryFrance Other Restriction Plates French road sign categoryFrance Temporary Information Signs French road sign categoryFrance Temporary Additional Plates French road sign category