C26 Prohibition Sign – No Overtaking by Goods Vehicles, Ø60 cm, Class I

C26 Prohibition Sign – No Overtaking by Goods Vehicles, Ø60 cm, Class I

The C26 bans overtaking by lorries only: a red lorry on the left beside a black car. Cars may still overtake, but goods vehicles stay in their lane.

When class I is used

Class I means RA1 retroreflective sheeting, with 70 cd/(lx·m²) for white and a 7-year service life. It suits places where the sign does not compete with other lights: roads and streets without strong lighting, local, minor and private roads. In areas with many light sources, such as streets with public lighting, shop windows and advertising, SR 1848-2 requires prismatic class 2 or 3 sheeting, because a class I sign gets lost against the background there.

Where it goes, under SR 1848-1:2024

It goes at the start of a section where goods vehicles may not overtake any motor vehicle except motorcycles without sidecars and mopeds. The end of the section is signed with the C35. On motorways and expressways it is installed with the P6 additional panel showing the hours when it applies.

Like all prohibition signs, it goes right after the junction before the restricted place, so drivers can go round without turning back, and it is repeated after every junction on the section. Exemptions for residents or certain vehicle categories are shown on the P34 and P18 additional panels.

Technical data

• 60 cm diameter disc (normal format, SR 1848-2): white with a red border, with a red lorry on the left and a black car on the right;
• 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.