Sign regulations

Airfield guidance signs are regulated. ICAO Annex 14 sets the global baseline, EASA CS-ADR-DSN applies it across Europe, the FAA advisory circulars govern the United States, and national authorities adapt it elsewhere.

Airfield guidance signs are regulated. A sign's colours, proportions and inscription are not a matter of style — they are fixed by a standard, and a sign is built and inspected against the rulebook in force where the airport sits.

This section explains who regulates airfield signs and how the standards relate, then covers each authority on its own page.

Who regulates what

The standards are anchored to a common baseline but reach it by different routes. ICAO sets the global baseline; EASA transposes it into European certification specifications; the FAA writes its own advisory circulars independently while recognising the same sign families; and national authorities publish their own versions elsewhere.

ICAO — Annex 14 is the global baseline. As the civil aviation arm of the United Nations, ICAO publishes Annex 14, Aerodrome Design and Operations, whose Chapter 5.4 defines the sign families, colours and inscriptions. ICAO Standards are adopted by its member states, which then legislate their own matching rules.
EASA — CS-ADR-DSN carries Annex 14 into European aerodrome certification. The Certification Specifications for aerodrome design keep the ICAO taxonomy and add European detail and guidance material.
FAA — advisory circulars govern signs in the United States. The FAA names the same signs by equipment type (the L-858 series) and sets their design, siting and construction in its advisory circulars.

Beyond these, national authorities and airport operators publish their own aerodrome standards, each anchored to Annex 14: the UK CAA (CAP 168), Transport Canada (TP 312), Australia's CASA (Part 139 MOS), the CAAC in China (MH 5001), and — as an airport operator rather than a national authority — Spain's Aena, whose EXA design specifications sit inside the EASA / AESA framework. Each has its own page below.

How the standards line up

| Authority | Document | Scope | |---|---|---| | ICAO | Annex 14, Volume I — Chapter 5.4 Signs | Global baseline standards and recommended practices | | EASA | CS-ADR-DSN, Book 1 — Subpart N Signs | Certification specifications for European aerodromes | | FAA | AC 150/5340-18 (design & siting); AC 150/5345-44 / spec L-858 (equipment) | United States airport sign systems | | UK CAA | CAP 168 — Chapter 7 Aerodrome Signals | United Kingdom aerodromes (transposes Annex 14) | | Transport Canada | TP 312 — Section 5.4 Signs | Canadian aerodromes (aligned with Annex 14) | | CASA | Part 139 Manual of Standards | Australian certified aerodromes (built on Annex 14) | | CAAC | MH 5001 — Technical Standards for Airport Flight Area | Chinese aerodromes (anchored to Annex 14) | | Aena (operator) | EXA design specifications | Aena's Spanish airports, inside the EASA / AESA framework |

The taxonomy is shared across all of them. Every framework recognises two colour-coded families — mandatory instruction signs (white on red) that tell you to stop and hold, and information signs (yellow and black) that tell you where you are and which way to go — even where the naming differs. The airfield guidance signs reference walks through the individual sign types; each type page notes the relevant clauses.

Editions cited here

Each authority page cites the specific document edition it draws on. Where a figure cannot be verified against a primary source it is described in words rather than given a made-up value — the point of this reference is to be correct, not merely complete.

Draw to any of them in Wingframe

Wingframe draws airfield guidance signs to ICAO, EASA and FAA geometry, so the sign you design matches the standard it will be built and inspected against. See what Wingframe does.