U27 Temporary Sign – Detour Route Ahead (Right), 65x85 cm, Class I

U27 Temporary Sign – Detour Route Ahead (Right), 65x85 cm, Class I

The 65x85 cm yellow panel announcing, 500 m ahead, the closed road and the detour route on the right, with class I retroreflective sheeting.

When class I is used

Class I (RA1) retroreflective sheeting is the basic class in SR 1848-2, with a 7-year service life. For roadworks, the standard requires temporary signs to have at least the class of the permanent signing on the section, so the class I version is used where the existing signs are class I too, typically on county and local roads and on streets without strong lighting. For national roads, lit boulevards or sections signed in class II there is the U27d_II version.

Where it goes, under SR 1848-1:2024

It is used when traffic is diverted onto detour routes that meet the requirements for roads open to public traffic. The panel can show the image of a prohibition or restriction sign (C1–C9, C11, C13–C20); this one shows the C1 (No entry), with the detour route on the right and a distance of 500 m.

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

When traffic is diverted, the rules require the signing to start with the signs that mark out the diversion route, and only then the prohibition signs at the ends of the work section. The approval file also includes a sketch of the detour routes, with the direction signing for the diverted traffic. Here too, 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

• 65x85 cm yellow panel with the closed road marked with the C1, the detour route on the right and a distance of 500 m;
• 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: 4 clamps for Ø48 mm posts and 8 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: 4 clamps for Ø48 mm posts and 8 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 class II sheeting version measures 80x120 cm: the U27d_II.