D3 Mandatory Sign – Turn Left, Ø60 cm, Class I

D3 Mandatory Sign – Turn Left, Ø60 cm, Class I

The D3 tells drivers, before the junction, that they must turn left: the white arrow curves to the left, and the turn is made after passing the sign.

When class I is used

Class I (RA1) sheeting returns 70 cd/(lx·m²) for white to the driver and has a 7-year service life, enough on roads where headlights are the only light: local, minor and private roads or quiet streets. In areas with street lighting, shop windows, advertising and dense urban traffic, however, SR 1848-2 requires prismatic class 2 or 3 sheeting. The class II version is the D3b_II (Ø80 cm).

Where it goes, under SR 1848-1:2024

It goes before the entrance to the junction where turning in the direction of the arrow is compulsory; the turn is made after passing the sign. The arrow can point right or left as needed.

For all mandatory signs, SR 1848-1:2024 provides that their meaning applies in the immediate vicinity of the place where they are installed, before or after it.

Technical data

• 60 cm diameter disc (normal format, SR 1848-2): blue with a white arrow curving to the left;
• 1 mm galvanised steel sheet, with pressed edges, no sharp edges;
• electrostatically painted with UV-resistant paint;
• class I retroreflective sheeting (RA1), resistant to UV and weathering, with a 7-year service life;
• weight: 3 kg;
• fixings included: 2 clamps for Ø48 mm posts and 4 bolts with nuts;
• CE marked; compliant with SR EN 12899-1:2007, SR 1848-1:2024, SR 1848-2:2011 and SR 1848-3:2011.

Mounting and size

Fixings for the post are included: 2 clamps for Ø48 mm posts and 4 bolts with nuts; clamps for Ø60 mm posts are available on request. The bottom edge of the sign goes 1.50–2.50 m above the road or kerb, and the edge nearest the road 0.50–2.0 m from the road platform. The sign must be visible from at least 50 m in built-up areas and 100 m outside them.

The post is ordered separately. For a fixed installation in a concrete foundation: the galvanised Ø48 mm post, 300 cm. For temporary use, with no foundation: the Ø48 mm tripod post, 120 cm. On concrete or paving, where you cannot dig: the Ø60 mm flange post, 300 cm, bolted down; for it, ask for the Ø60 mm clamps when you order.

The 60 cm diameter is the normal format in SR 1848-2, for county and local roads, streets and private roads open to public traffic. National roads call for the large Ø80 cm format and motorways for the very large Ø100 cm one; the standard forbids using a smaller format than the road category requires. The large Ø80 cm version with class II sheeting is the D3b_II.