U8 Temporary Sign – Roadworks, 70 cm, Class I

U8 Temporary Sign – Roadworks, 70 cm, Class I

The most widely used work-site sign, in the 70 cm format with class I sheeting. It is the triangle that almost every signing layout for works on streets and local roads calls for.

When class I is used

Class I means RA1 retroreflective sheeting, with 70 cd/(lx·m²) for white, suited to roads with low and medium speeds and few light sources. In areas with street lighting, shop windows and advertising, however, SR 1848-2 requires prismatic class 2 or 3 sheeting, and on a section already signed in class II the temporary sign cannot have a lower class either. For national roads, lit boulevards or sections signed in class II there is the U8_II version.

Where it goes, under SR 1848-1:2024

It warns of a road section where works are being carried out. It is installed following the signing layout of the works, under the technical regulations in force. SR 1848-1:2024 allows flashing amber lamps, such as the V8-Y, to be mounted at the corners of the sign.

What the roadworks rules require (Order 1112/411/2000)

The sign belongs to the advance signing, which is installed first, ahead of the work zone in the direction of travel, with at least 50 cm of clear space outside the carriageway. The rules require signs to be stood on the ground first, to check that they are clearly visible, and only then fixed to a support; no more than two signs go on the same support or side by side, and on one-way roads or bends they can be repeated on the left side or above the road.

On public roads, works are signed under the methodological rules approved by Order MI/MT no. 1112/411/2000. The road closure or traffic restriction is approved by the road authority, with the traffic police's agreement, on the basis of a signing layout endorsed as final, a copy of which the contractor keeps at the work site. The contractor installs, completes and maintains the signing for the whole job, removes it at the end and restores the original signing; accidents caused by incomplete or missing temporary signing are entirely the contractor's responsibility.

At night, if the existing signing on the road is retroreflective, the temporary signing must be retroreflective too and can be supplemented with flashing or sequential (“cascade”) amber lamps; on main and connecting streets in towns, retroreflective temporary signs are supplemented with flashing amber lamps.

Technical data

• triangle with a 70 cm side, red border and yellow background, with the worker-with-shovel symbol;
• 1 mm galvanised steel sheet, with rounded corners and pressed edges, no sharp edges;
• electrostatically painted;
• class I retroreflective sheeting (RA1), with a 7-year service life;
• fixings included: 2 clamps for Ø48 mm posts and 4 bolts with nuts;
• 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. Temporary signs can also be mounted on mobile supports (SR 1848-2), such as the V2-15 or V2-28.

As with permanent signs, the 70 cm triangle 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 90 cm format. The class II, large-format version is the U8_II.