D4 – One-way traffic after the sign

Road sign D4 belongs to Group D “Special regulation road signs” and indicates that all vehicles must move only in the direction shown by the arrow after the point where the sign is installed It is used to mark sections of roads where one-way traffic is established ensuring safety and proper traffic organization by preventing vehicles from entering from the opposite direction

After the sign all drivers are obliged to move strictly in the indicated direction Violating this rule is considered a serious traffic offense and may result in penalties and create danger for other road users

Visually the D4 sign has a square shape with a blue background and a white arrow pointing straight ahead clearly indicating that the movement is one-way in that direction The design and color scheme follow the standards for special regulation signs for easy recognition

Standard dimensions of the D4 sign are
– 600 mm for use in urban areas
– 900 mm for use outside urban areas and on roads with higher speeds

The sign is placed at the beginning of one-way road sections or intersections where it is necessary to indicate clearly the permitted direction of movement It may be accompanied by additional plates providing clarifications or access restrictions

The main purpose of the D4 sign is to ensure safety order and clarity in traffic organization by preventing wrong-way driving and reducing the risk of collisions