Book

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Traffic signs

Traffic rules

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.

Oncoming vehicles in the middle of road.

Another train coming if lights continue.

11. For minutes

A supplementary sign for ... minutes is placed below a main traffic sign to indicate that the regulation or restriction applies for a specified duration in minutes. Example: “For 30 minutes”.

12. For hours

A supplementary sign for ... hours is placed below a main traffic sign to indicate that the regulation or restriction applies for a specified duration in hours. Example: “For 2 hours”.

13. At days during time shown

A supplementary sign at days during time shown is placed below a main traffic sign to indicate that the regulation or restriction applies only on specific days and during the times displayed on the sign.

14. Minimum overtaking distance cyclist

The supplementary sign Minimum overtaking distance cyclist indicates that drivers must keep a safe minimum side distance from cyclists when overtaking them. It serves as a reminder to protect cyclists by maintaining enough space during the maneuver.

15. Recommended speed

The supplementary sign recommended speed is used to provide additional context to a main sign indicating a recommended (advisory) speed — not a legal limit, but a safe or optimal speed under normal conditions. Often used in curves, descents, ramps, tunnels, or construction zones.

16. Reduce speed now

The supplementary sign reduce speed now is a warning or advisory panel placed under or near a main sign to urge drivers to immediately lower their speed due to upcoming danger or change in road conditions. Used when a hazard lies ahead, such as: sharp curve, toll booth, traffic queue, lane closure, crash zone or sudden narrowing.

17. Drive slow

The supplementary sign drive slow is an advisory or cautionary message instructing drivers to reduce their speed and proceed carefully — usually due to temporary hazards or sensitive zones. The message is often used where vulnerable road users, obstacles, or unexpected conditions may be present.

18. Speed in km/h

The supplementary sign speed in km/h clarifies that the indicated speed is expressed in kilometres per hour (km/h) — particularly useful in areas where there may be confusion with miles per hour (mph) (e.g. near borders, airports, or ports).

19. Traffic calming

The supplementary sign traffic calming informs drivers that they are entering an area with measures designed to reduce vehicle speed and improve safety. Alerts drivers to expect various traffic calming features such as: speed bumps, narrowed lanes or chicanes, raised crossings or islands, road surface changes.

20. Pedestrian zone

The supplementary sign pedestrian zone indicates an area where pedestrians have priority and where vehicle access is restricted or regulated to ensure pedestrian safety. Motorized traffic may be prohibited or limited to residents, deliveries, or specific times. Common near schools, parks, or public squares.

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