Prohibition of traffic with motorized vehicle towing a trailer
The sign indicates a prohibition of traffic with a motorized vehicle towing a trailer of a type other than a drawbar trailer or a towed trailer.
When You See This Sign
When you see the C6 sign you must not proceed if you are driving a motorized vehicle towing a trailer of the prohibited type. Stop or turn off in good time if your trailer is covered by the ban, and follow any supplementary plates indicating exceptions.
Rules & Regulations
- The sign prohibits traffic of all motorized vehicles that have an attached trailer of a type other than the explicitly exempted mounted trailers or utility trailers.
- The prohibition applies regardless of the vehicle's size — it includes passenger cars, trucks, motorcycles and tractors if they are towing a prohibited trailer.
- The sign's prohibition applies from the location where it is posted and continues until a cancellation sign or other indication shows the end of the prohibition.
- An additional plate beneath the sign can indicate exceptions (e.g., permitted for certain vehicles or times) and those exceptions must be followed.
Tips for Drivers
- Plan your route in advance when driving with a trailer — avoid roads where the C6 sign is common, such as narrow city streets or sensitive environmental areas.
- Always check for any additional plates under the sign: they can provide specific exceptions or time restrictions that change what applies.
- If you are already approaching the sign and your trailer is covered by the prohibition, find a safe place to stop and turn around before the sign — do not make sudden maneuvers.
- Be certain of the type of trailer you have (check the registration certificate or the owner's manual) so you know whether it is classified as one of the exempt types, such as a mounted trailer or a utility trailer.
Common Mistakes
- Thinking that the sign only prohibits passenger cars with trailers — it applies to all motorized vehicles with a prohibited trailer.
- Assuming that small or lightweight trailers are always allowed; if the trailer is not a mounted trailer or a utility trailer, the prohibition may still apply.
- Missing an additional plate and therefore believing the prohibition applies when in fact there are specified exceptions.
Test Yourself
Road Sign: Prohibition of traffic with motorized vehicle towing a trailer
How does this sign affect you as a car driver?
- A Motor vehicles with an attached trailer are not allowed to drive here.
- B Trailers without a towing vehicle are prohibited from being parked here.
- C Only trucks with trailers are allowed to drive here.
- D Heavy truck traffic is allowed but passenger cars are prohibited.
Exam Tip
On the theory test you may be asked to determine whether a motorcycle with a trailer is covered by C6 — remember that the prohibition applies to all motorized vehicles with a prohibited trailer, including motorcycles. Also pay attention to questions about supplementary plates that provide exceptions.
Did You Know?
C6 is often used on narrow inner-city streets and on small country roads where accessibility or safety is impaired by vehicles with larger or specialized trailers. The text on the sign specifies the exceptions (mounted trailers and utility trailers), which can confuse many because not all trailer types are obvious to drivers.
Frequently Asked Questions
Does the prohibition apply to all kinds of trailers?
No — the text of the sign states that the prohibition applies to trailers of a type other than mounted trailers or utility trailers. If your trailer is one of these exempt types it may be allowed, otherwise the prohibition applies.
Does the sign also apply to motorcycles with trailers?
Yes. The sign covers all motorized vehicles with an attached trailer, so a motorcycle towing a prohibited trailer is included in the prohibition.
How long does the prohibition apply after I pass the sign?
The prohibition applies from the location where the sign is posted and continues until a cancellation sign or other traffic rule indicates that the prohibition has ended. It may also end at junctions where other rules regulate traffic.
What do I do if I'm unsure whether my trailer is a mounted trailer or a utility trailer?
Check the trailer type in the registration certificate or in the owner's manual. If you are still unsure, interpret the prohibition conservatively and choose another route or stop and investigate before you continue.
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