Prohibition of Heavy Truck Traffic
The sign indicates a prohibition of heavy truck traffic.
When You See This Sign
When you see the sign you should quickly determine whether your vehicle is affected by knowing or checking the total weight. If your vehicle is heavy according to the limit (over 3.5 tonnes) you must choose another route; if you are unsure, follow the instructions on any supplementary plates or stop safely and check.
Rules & Regulations
- The sign prohibits traffic by heavy trucks, that is, trucks whose maximum permitted gross weight exceeds 3.5 tonnes.
- The prohibition applies from the location where the sign is placed and continues until it is lifted by an end sign or other traffic instruction/rule indicating otherwise.
- Exceptions can be indicated by a supplementary plate under the sign (for example time restrictions, local deliveries, or a special permit) — follow what the supplementary plate indicates.
- If a truck is towing a trailer or is part of a vehicle combination, the total weight of the vehicle/combination is counted; if the combined maximum permitted gross weight exceeds 3.5 tonnes, it is subject to the prohibition.
Tips for Drivers
- Check your vehicle's maximum permitted gross weight (vehicle registration document) before planning your route if you are driving a transport vehicle.
- Always read any supplementary plates under the sign — they can indicate exceptions, validity times, or the exact restriction that applies.
- As a professional driver, plan alternative routes in advance; turning or reversing large vehicles in confined areas can be dangerous and time-consuming.
- If you are unsure whether the prohibition applies to your vehicle, stop safely at the roadside and check the registration details or ask a nearby business before continuing.
Common Mistakes
- Interpreting the sign as banning all vehicles with trailers — it is the total weight that determines the restriction, not merely the presence of a trailer.
- Assuming the sign automatically applies in both directions along the entire street — the prohibition applies in the direction the sign faces and until it is lifted.
- Ignoring supplementary plates and missing that exceptions or time restrictions may actually allow passage.
Test Yourself
Road Sign: Prohibition of Heavy Truck Traffic
What does this road sign mean?
- A Heavy trucks are prohibited from driving here (restriction for heavy truck traffic).
- B Passenger cars are prohibited from driving here.
- C Trucks are only allowed to drive during daytime.
- D All vehicles above a certain height are prohibited.
Exam Tip
On the theory test you may be given a statement about a vehicle with a certain total weight (for example a truck of 3.4 tonnes or 3.6 tonnes). Remember to compare against 3.5 tonnes: 3.4 tonnes will usually be allowed to pass while 3.6 tonnes falls under the prohibition, unless exceptions are indicated.
Did You Know?
The sign is often used in city centres, residential areas and historic environments to reduce road wear, noise and accident risks. The 3.5-tonne limit is also a common EU standard for distinguishing between light commercial vehicles and heavier trucks.
Frequently Asked Questions
Does the sign apply if I am driving a truck towing a trailer?
Yes, you generally count the total weight of the vehicle or vehicle combination. If the combined maximum permitted gross weight exceeds 3.5 tonnes, the combination is subject to the prohibition.
Does the prohibition apply to buses or passenger cars?
The sign is primarily aimed at heavy trucks (commercial traffic). Passenger cars are normally not covered, and buses may be affected by local rules or exceptions — always check the supplementary plate or local regulations.
Are there exceptions or is it possible to obtain a permit?
Yes, exceptions can be indicated by a supplementary plate under the sign or by a specific permit from the responsible authority. Emergency and response vehicles and vehicles with an explicit exemption may also be exempt.
How long does the prohibition apply after the sign?
The prohibition applies from the sign and until it is lifted by an end sign or other instruction showing that the prohibition no longer applies. Follow the signs you pass to determine when the restriction ends.
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