An additional sign is a traffic sign placed directly below another sign to provide extra information or clarify how the main sign should be understood. It can specify conditions such as distance, time periods, road users affected, directions, or special circumstances. Additional signs do not create new rules by themselves but modify, limit, or explain the meaning of the sign above them so drivers can apply the rule correctly in that specific situation.

For disabled people.

For cyclists.

For mopeds.

For motorcycles.

For cars.

For cars with trailer.

For taxis.

For toads.

For tractors.

For caravans.

For recreational vehicles.

For trucks.

For trucks with trailer.

For articulated trucks.

For large trailers.

For buses.

For trolleybuses.

For trams.

Disabled allowed.

Cyclists allowed.

Mopeds allowed.

Motorcycles allowed.

Cars allowed.

Cars with trailer allowed.

Taxis allowed.

Tractors allowed.

Caravans allowed.

Recreational vehicles allowed.

Trucks allowed.

Trucks with trailer allowed.

Articulated trucks allowed.

Large trailers allowed.

Buses allowed.

Trolleybuses allowed.

Trams allowed.

Local buses allowed.

Emergency vehicles allowed.

Delivery vehicles allowed.

Vehicles with permission allowed.

Local traffic allowed.

Traffic from both directions.

Cyclists from both directions.

Buses from both directions.

Cyclists in both directions.

Buses in both directions.

To the left.

To the left or right.

To the right.

... meter to the right.

Sidewalk on the left.

Sidewalk on the right.

Panel valid on lane.

... meter ahead.

Stop ... meter ahead.

For ... kilometer.

... meter ahead for ... meter.

Crossroad shape.

Crossroad shape.

Crossroad shape.

Crossroad shape.

Crossroad shape.

Crossroad shape.

Crossroad shape.

Crossroad shape.

Crossroad shape.

Crossroad shape.

Priority for cyclists crossing the road.

Priority for cyclists crossing the road.

Priority for cyclists crossing the road.

Covered bicycle storage.

Perpendicular/straight parking.

Angle parking.

Parallel parking on sidewalk.

Parallel parking on sidewalk.

Parallel parking partially on sidewalk.

Parallel parking partially on sidewalk.

Perpendicular parking on sidewalk.

Perpendicular parking on sidewalk.

Perpendicular parking partially on sidewalk.

Perpendicular parking partially on sidewalk.

Parking on shoulder prohibited.

Parking on shoulder prohibited.

Illegal parking towing.

Paid parking.

Disc parking.

During time shown.

During times shown.

For ... hours.

At days during time shown.

At days during times shown.

Diesel.

Gasoline.

Children crossing.

Speed bump.

Traffic calming island.

Payment obligation.

Ticket exchange.

Number of ...

Private road.

Road closure.

Wheel clamp.

Motorail.

Accident risk.

Soft verge.

Ruts.

Ice.

Wet.

Loading zone.

Right of way changed.

Leaning trees.
The supplementary sign for disabled people is a panel placed below a main traffic sign to indicate that the sign's regulation applies specifically to persons with disabilities. It clarifies that the main sign is intended only for disabled people, often those with an official disability permit.
© via Wikimedia.org
The supplementary sign for cyclists is a panel placed below a main traffic sign to indicate that the rule, warning, or instruction applies specifically to cyclists. It limits the scope of the main sign only to bicycle users, ensuring that other road users are not affected unless separately indicated. Example: No entry + for cyclists = cyclists are not allowed to enter, but other traffic may proceed.
© via Wikimedia.org
The supplementary sign for mopeds is a traffic panel placed below a main traffic sign to indicate that the instruction, restriction, or warning applies specifically to mopeds. This supplementary sign ensures that only moped riders are affected by the main sign, separating their rules from those of cyclists, motorcycles, and cars.
© via Wikimedia.org
The supplementary sign for motorcycles is a traffic panel placed below a main sign to indicate that the rule, prohibition, or warning applies specifically to motorcycles. This sign targets motorcyclists, helping to regulate their behavior, warn of specific hazards, or grant/restrict access in certain areas. A motorcycle is a two-wheeled motor vehicle (with or without a sidecar), legally distinct from: mopeds, speed pedelecs, cars or trucks.
© via Wikimedia.org
The supplementary sign for cars is a panel placed below a main traffic sign to indicate that the instruction, prohibition, or warning applies specifically to passenger cars. A car in this context usually refers to: Standard passenger vehicles (sedans, hatchbacks, SUVs). Not including: motorcycles, trucks, buses, mopeds, or bicycles.
© via Wikimedia.org
The supplementary sign for cars with trailer is a panel placed below a main traffic sign to indicate that the regulation, restriction, or instruction applies specifically to passenger cars towing a trailer. Such as: luggage trailers, small utility trailers, camping caravans or boat trailers. This does not include: trucks with trailers or articulated lorries.
© via Wikimedia.org
The supplementary sign for taxis is a traffic panel placed below a main traffic sign to indicate that the rule, permission, restriction, or facility applies specifically to taxis. A taxi is a licensed passenger transport vehicle that picks up passengers on demand.
© via Wikimedia.org
The supplementary sign for toads is a traffic panel placed below a main sign to indicate that the rule or warning specifically concerns toads, usually in the context of seasonal migrations where toads cross roads in large numbers.
© via Wikimedia.org
The supplementary sign for tractors is a traffic panel placed below a main sign to indicate that the regulation, restriction, or instruction applies specifically to tractors.
© via Wikimedia.org
The supplementary sign for caravans is a traffic panel placed below a main sign to indicate that the instruction, restriction, or permission applies specifically to caravans (also called travel trailers or camping trailers). A caravan is a towable trailer equipped for sleeping or living, used for recreational travel. It is: pulled by a passenger car and not self-propelled (unlike motorhomes).
© via Wikimedia.org