B3 Priority Sign – Priority Road, 60x60 cm, Class I

B3 Priority Sign – Priority Road, 60x60 cm, Class I

The B3, the white diamond with a yellow centre, tells drivers they are on a priority road: at the junctions ahead, vehicles on the side roads must give way to them.

When class I is used

The sign has class I (RA1) retroreflective sheeting: 70 cd/(lx·m²) for white and a 7-year service life. It is the economical choice for places without many light sources, such as local, minor and private roads or streets without strong lighting. Where there is street lighting, shop windows or advertising, SR 1848-2 requires prismatic class 2 or 3 sheeting, which stands out better against a lit background.

Where it goes, under SR 1848-1:2024

The standard provides for it in four cases: on priority roads at the exit from a built-up area, on the same support as the road identification signs (F37 national road, F38 county road, F39 local road or F40 road open to international traffic); outside built-up areas after major junctions with other public roads, 30–50 m on, to confirm the priority to drivers joining the road, again with the F37–F40 as needed; in built-up areas, before a junction where the priority road changes direction and drivers may be unsure, with the P21 additional panel (“Direction of the priority road”); and before junctions with minor streets in towns and cities.

Technical data

• white diamond with a 60 cm side, with a 320 mm yellow square in the centre framed by a 5 mm black line;
• 1 mm galvanised steel sheet, with rounded corners and 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: 3.2 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. When they share a post, priority signs go above mandatory signs.

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 side is the size SR 1848-2 sets for the B3. There is also a class II sheeting version, the B3_II, for roads with a lot of ambient light.