Road Sign J4 – “Advance Turn Indicator”

The road sign J4 informs drivers about an upcoming turn or intersection, showing the direction and distance to it. It helps drivers prepare safely and in advance for the maneuver.

Shape and Appearance:
The sign is a blue rectangle with a white border, displaying an arrow indicating the direction of the turn or intersection, sometimes with distance information.

Meaning:
J4 is placed before intersections, junctions, or curves to provide clear information about upcoming maneuvers and to prevent sudden changes in direction.

Dimensions:
According to Regulation No.18 on road signage:

• Urban areas: 600 x 400 mm

• Outside urban areas: 800 x 500 mm

• Highways or high-speed roads: 1000 x 600 mm

Materials and Manufacture:
Made of reflective film Class 1 or 2 applied on galvanized steel or aluminum plate, ensuring high visibility and weather resistance.

Application:
The J4 – “Advance Turn Indicator” is placed at a safe distance before the turn, allowing drivers to prepare for the maneuver safely.