Skip to main content
UK Road Signs

Information sign

Primary route direction sign

Primary route direction sign: a green sign with white lettering, a yellow route number and a map of the junction ahead
Sign image: Department for Transport, © Crown copyright

What does the Primary route sign mean?

Green direction signs are used on primary routes: the main A roads between major towns. Route numbers are yellow.

Also known as: Green road sign, Green direction sign

What it means

The sign gives directions on a primary route. Green backgrounds, white lettering and yellow route numbers mark these main A roads.

Primary routes are the A roads of national and regional importance. With motorways, they form the national network between major towns.

Panels of another colour show a different kind of route from the junction ahead: blue for a motorway, white for a non-primary route and brown for a tourist destination.

Where you'll see it

On the approach to junctions on primary A roads. A map-type version, like this one, shows the layout of the junction.

Rules to know

  • Direction signs on primary routes have green backgrounds, yellow route numbers and white lettering. Primary routes always have A numbers.

    Know Your Traffic Signs, p. 111

  • On an advance direction sign, blue panels show motorways, green panels primary routes and white panels non-primary routes.

    Know Your Traffic Signs, p. 111

  • A map-type sign shows the junction layout. The width of each route on it shows the type of road: wide for primary routes and motorways.

    Know Your Traffic Signs, p. 112

Common mistakes

  • Mistake: Thinking every A road has green signs.

    Instead: Only primary routes do. Other A roads are non-primary routes, with white signs.

Test yourself

Recalling the answer helps it stick. Pick an answer to see how you did.

Question 1 of 2

What does this sign mean?

Green rectangular sign with white lettering, a yellow route number and a white map of the junction ahead

Ready for more? Take the Information Signs Quiz

Download this sign

© Crown copyright. Free to reuse under the Open Government Licence v3.0, as long as the sign is reproduced accurately and not in a misleading context.

More information signs

All information signs

Sources

Sign image: Department for Transport, Traffic sign images (diagram 2025). © Crown copyright, reused under the Open Government Licence v3.0.

Last reviewed 6 October 2026. This page explains the sign in our own words; for the full rules, see The Highway Code. How we source and check content