The OB-13 traffic sign is a Dutch regulatory sign indicating that a specific rule or restriction applies exclusively to lorries (heavy goods vehicles) and buses. Its purpose is to manage traffic flow, capacity, or environmental impact at particular locations by targeting the largest vehicle classes. When you see this sign, remember that while cars and motorcycles are exempt from this specific rule, lorries and buses must comply. It's crucial to understand this distinction, especially in the context of traffic management on specific routes or at certain times.
This supplementary road sign meaning is crucial for professional drivers. It indicates that the primary traffic rule applies exclusively to lorries and buses, requiring a specific understanding for your Dutch driving theory test and daily road safety.
The plate for lorries and buses is a rectangular supplementary panel placed directly below a main traffic sign and it narrows the scope of that sign to heavy goods vehicles and large buses only. It is used where road design, weight limits, emissions, noise control or safety require different rules for these vehicles. Other road users continue under the normal main sign rules unless another plate specifies otherwise.
This supplementary plate shows that the rule on the main sign applies specifically to lorries and buses. It tells drivers of heavy goods vehicles and large passenger buses that they must follow the indicated restriction or obligation, while most smaller vehicles follow the general rules. If you drive a lorry or bus, you adjust your speed, route, or stopping behavior to match this targeted instruction.
Get clear, practical answers to the most common questions about the OB-13 - Only Applies to Lorry and Bus Drivers 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 Dutch driving theory exam in the Netherlands.
The OB-13 sign serves to inform drivers that a particular traffic rule or restriction, often indicated by another sign placed above or next to it, is specifically for lorries and buses. It helps manage traffic by applying rules only to the largest vehicles, which might be due to their size, weight, emissions, or impact on road capacity.
No, if you are driving a car or motorcycle, the OB-13 sign indicates that the associated rule does not apply to you. You are exempt from the specific restriction or requirement that this sign modifies. However, always be aware of other signs that may affect your driving.
A common trap in the theory exam is assuming the OB-13 sign itself imposes a rule, rather than modifying an existing one. Learners might mistakenly think it's a prohibition for cars, when in fact, it's an information sign clarifying which vehicles a different sign applies to. Always consider the OB-13 sign in conjunction with any sign displayed above it.
Yes, the OB-13 sign is almost always used in combination with other signs, such as speed limit signs, entry prohibition signs, or signs indicating specific route requirements. It clarifies that these combined rules only affect lorries and buses, not smaller vehicles.
If a lorry or bus driver sees the OB-13 sign displayed above an entry prohibition sign (like a 'no entry' sign), it means lorries and buses are prohibited from entering that road or area. Cars and motorcycles would typically be allowed to proceed, assuming no other signs prohibit them.
A clear reference image of the OB-13 - Only Applies to Lorry and Bus Drivers road sign used in the Netherlands.

The OB-13 - Only Applies to Lorry and Bus Drivers road sign may also be known by these alternative names or terms.
The OB-13 - Only Applies to Lorry and Bus Drivers road sign is part of the Supplementary Plates (OB) category, which groups together signs with similar rules and functions.
Comparing related road signs, like this 'Applies to Lorries and Buses' indicator, sharpens your ability to distinguish them. Practicing traffic sign comparison aids theory test revision and ensures you recognise all signs accurately on Dutch roads.

This sign means the rule applies ONLY to horse riders.

The OB-02 sign means the rule applies exclusively to cyclists.

This sign means the rule ahead exclusively applies to moped riders.

This Sign Exclusively Targets Cyclists and Moped Riders

Understand the OB-05 sign: This restriction applies only to agricultural vehicles.

OB-06: This Sign Strictly Applies Only to Motorcyclists

This sign OB-07 means the following rule applies only to motorcycles and passenger cars.

OB-08: This Sign Only Applies to Motor Vehicles with More Than Two Wheels
After reviewing the full list of Dutch road signs, deepen your understanding by exploring signs organized by category or practicing with targeted questions. This systematic approach ensures you fully grasp every sign's meaning and application, preparing you thoroughly for your CBR driving theory exam.
View All Dutch Road Signs