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Street Solutions UK  |  SKU: 020103

Single File Traffic' Quick-Fit Supplementary Plate Diagram 518 (Face Only)

£7.63 Ex. VAT
£9.15 Inc. VAT
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  • Made in the UK
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Why it works

A small plate that keeps traffic moving

Chapter 8 and Red Book

The 518 plate conforms to both, so your set-out stays road-legal.

Reflective after dark

RA1 Class 1 sheeting keeps the plate readable in low light on slower roads.

Frame-ready

Drops into a quick-fit frame beneath the main warning face on 300mm centres.

Nothing to steal

Non-metallic plastic backing carries no scrap value.

British made

Manufactured in the UK, with custom backings and hole centres available.
Overview

Single File Traffic Supplementary Plate - Overview

The Single File Traffic plate (Diagram 518) is a face-only supplementary board fitted beneath a Road Narrows sign to tell drivers to proceed in single file. Printed on RA1 Class 1 engineering-grade reflective on a 3mm plastic backing, it conforms to Chapter 8 and The Red Book and is made in the UK. Quick-fit frames are sold separately.
725mm
Length
275mm
Height
3mm
Backing
RA1class
Reflective grade
Dimensions
Length725mm
Height275mm
Depth3mm
Hole centres300mm
Details
Diagram reference518 (Single File Traffic)
Backing3mm plastic board
Reflective gradeRA1 Class 1 (engineering grade)
ComplianceChapter 8, The Red Book
MaterialNon-metallic, no scrap value
OriginMade in the UK

Frequently asked questions

Can I use the 518 plate on its own?

No. Diagram 518 is a supplementary plate, designed to sit beneath a warning sign - usually Road Narrows Left or Right (Diagram 517). On its own it gives drivers no warning context, so always pair it with the main face.

What are the plate's dimensions?

It measures 725mm long by 275mm high on a 3mm plastic backing board, with 300mm hole centres.

Will it fit the frames I already own?

It is drilled on 300mm hole centres, which suits our mini quick-fit frames. Check the toggle centres on your existing frames before ordering; custom hole centres are available if yours differ.

Is this plate legal for road use?

Yes - it conforms to Chapter 8 of the Traffic Signs Manual and The Red Book. Follow current government guidance on placement when setting out your works.

How reflective is it?

The face is printed on RA1 (Class 1) engineering-grade prismatic sheeting, intended for lower-speed roads such as urban streets, residential areas and local roads.

Does it come with a frame or fixings?

No - this is the printed face only. Quick-fit frames and ballast weights are sold separately.

Can I order a different material?

Yes. We print faces to specification in GRP, composite, aluminium or plastic, with 300mm, 450mm, 750mm or 900mm hole centres - email sales@streetsolutionsuk.com.

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