D5 Mandatory Sign – Pass on the Left, Ø80 cm, Class II

D5 Mandatory Sign – Pass on the Left, Ø80 cm, Class II

The left-arrow version, on an Ø80 cm blue disc with class II prismatic sheeting. It is used less often than passing on the right, for example at obstacles on the left side of a one-way road or at works that close the right-hand lane.

Why class II

Class II (RA2) prismatic sheeting returns roughly three to four times more headlight to the driver than class I sheeting, so the sign can be seen from further away at night and stays legible when viewed at an angle. SR 1848-2 requires prismatic class 2 or 3 sheeting in areas with many light sources, such as streets with public lighting, shop windows and advertising, where a class I sign gets lost in the background. Class II sheeting has a guaranteed 10-year service life, against 7 years for class I.

Where it goes, under SR 1848-1:2024

It goes at the ends of refuges, traffic islands and spaces separating carriageways, or before another obstacle on the road, where vehicles must pass the obstacle on the left, as the arrow shows. It is usually installed with the A44 directional marker, which shows passing on the left.

Technical data

• 80 cm diameter blue disc with a white arrow pointing down to the left;
• 1 mm galvanised steel sheet, with pressed edges, no sharp edges;
• electrostatically painted with UV-resistant paint;
• class II (RA2) prismatic retroreflective sheeting, resistant to UV and weathering, with a guaranteed 10-year service life;
• 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. On traffic islands, central reservations and tram refuges, the bottom edge can be 0.60–2.50 m above kerb level (SR 1848-2).

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 80 cm diameter is the large format in SR 1848-2, required on national roads; motorways use the very large 100 cm format. County and local roads, streets and private roads open to public traffic only need the normal Ø60 cm format: the class I sheeting version is the D5b.