What Do Airport Signs Mean? A Student Pilot’s Guide to Reading the Taxiway

Airport signs are the color-coded panels along taxiways and runways that tell you where you are, where you can go, and where you must stop. The FAA groups them into six types in AIM 2-3-8 through 2-3-13: red mandatory instruction signs, black location signs, yellow direction and destination signs, yellow information signs, and black runway distance remaining signs. Color tells you the sign’s job before you even read the legend.

Ever taxied up to a fork in the pavement, looked at a cluster of red and yellow signs, and frozen because you were not sure which one was an order and which was just a hint? Every student does it. Once you learn the color logic, the airport stops being a maze and starts narrating your position out loud. This guide walks through every sign the FAA uses, the same plain-English way a good instructor would brief it before your first solo taxi.

Why do airport signs come in different colors?

Airport signs use a fixed color code so you can sort them by job before you read a single character. Red signs are mandatory orders, black signs tell you your current location, and yellow signs give you direction or information. The FAA standardizes this scheme in AIM 2-3-8 through 2-3-13 and in Advisory Circular AC 150/5340-18, so a sign means the same thing in Anchorage as it does in Atlanta.

That color logic is doing real work. When you roll up to an intersection with five signs on a single post, you do not have to read all five at once. Your eye finds the red panel first, because red is the only color that can stop you, then it picks up the black “you are here” sign, then it follows the yellow arrows to wherever you are headed. Train your eye to triage by color and the busiest sign cluster on the field becomes manageable. The same grammar shows up in the pavement paint, which we will connect later in this guide.

What is a mandatory instruction sign?

A mandatory instruction sign has white text on a red background and marks the entrance to a runway, a critical area, or a prohibited area you may not enter without an ATC clearance. Per AIM 2-3-8, this is the most safety-critical sign on the airport, and it is the one that keeps you out of an active runway.

The most common mandatory sign is the runway holding position sign, which shows the runway designators of the runway ahead, for example “16-34” or “9-27.” It is posted beside the yellow hold-short markings painted across the taxiway. When you reach it at a towered airport, you stop and hold until tower clears you to cross or to enter. At a non-towered field there is no controller to clear you, so you stop, look, confirm the runway and approach are clear, and only then proceed. The sign never gives you permission; it only tells you a runway begins here.

Other red signs include the ILS critical area sign (showing the ILS symbol), marking where you hold to keep your aircraft out of the precision approach signal, and the “NO ENTRY” sign (a white horizontal bar inside a red circle) marking pavement you may not enter at all, like a one-way taxiway. When in doubt at a red sign, the safe default is always to stop and ask.

What does a location sign tell a pilot?

A location sign has yellow text and a yellow border on a black background and identifies the taxiway or runway you are currently on. Think of it as the “you are here” dot on a mall map. AIM 2-3-9 calls it a location sign, and it is the sign that anchors you to your airport diagram.

A taxiway location sign shows a single letter or letter-number, like “B” or “C2,” telling you that you are on Taxiway Bravo. A runway location sign shows the runway designator and tells you which runway surface you are physically on, which matters when you have exited a runway and need to confirm you are clear of it. Because the lettering is yellow on black, it is easy to confuse with a direction sign at a glance, so look for the key difference: a location sign has no arrow. No arrow means “you are here,” not “go this way.” When ground control asks your position, a location sign is exactly what you read back to them.

How do direction and destination signs work?

Direction and destination signs both use black text on a yellow background and tell you where things are, always in the direction the arrow points. A direction sign identifies the taxiways leading out of an intersection, showing each taxiway’s letter with an arrow, so a sign reading “B ◄” means Taxiway Bravo is to your left. AIM 2-3-10 covers direction signs and AIM 2-3-11 covers destination signs, and together they are how you navigate a clearance like “taxi via Bravo, Charlie.”

A destination sign points you toward a general destination rather than a specific taxiway: a runway, the terminal, a military ramp, or civil aviation parking. It shows the destination, sometimes abbreviated, with an arrow, for example “RWY 27 ►” or “FBO ►.”

Here is the rule that prevents most taxi confusion: direction and destination signs are read in the direction the arrow points, and the signs are arranged left to right in the order the taxiways appear from your position. Treat the arrows as gospel and the letters as the taxiways in your clearance, and you can navigate an unfamiliar airport at night without guessing. Lose the picture, stop, and ask ground for progressive taxi instructions; there is no penalty for asking.

What are information and runway distance remaining signs?

Two more sign families round out the set. An information sign has black text on a yellow background and provides field information not covered by other signs, such as radio frequencies, noise abatement procedures, or areas that cannot be seen from the tower. AIM 2-3-12 leaves the exact content to the airport operator, so read these rather than assuming you know what they say.

A runway distance remaining sign has a white numeral on a black background and tells you the distance, in thousands of feet, remaining on the runway. Per AIM 2-3-13, a sign showing “3” means roughly 3,000 feet of usable runway remain ahead of you. These line the runway edges and count down as you roll, giving you a fast gut check on whether you have enough pavement left to take off or to stop, which makes them invaluable during a high-density-altitude takeoff or a rejected-takeoff decision.

Do not confuse the black distance-remaining sign with a black location sign. The distance sign is a plain white number with no letters and no border; the location sign is a yellow letter with a yellow border. One tells you feet of runway left, the other tells you the taxiway you are sitting on.

How do airport signs and pavement markings work together?

Signs and pavement markings are two halves of one system, and the FAA designs them to reinforce each other so a missed sign is backed up by paint, and missed paint is backed up by a sign. The clearest example is the runway hold: the red runway holding position sign stands right beside the yellow holding position markings painted across the taxiway, two solid lines and two dashed lines. Both say the same thing: a runway begins here, stop without a clearance.

The rule that prevents most runway incursions lives in that pavement marking. When the two solid yellow lines are on your side, you are approaching the runway and must hold; when the dashed lines are on your side, you are exiting and may cross to clear the runway. The red sign confirms which runway you are about to enter. Reading the sign and the paint together gives you a redundant, unambiguous picture every time.

Yellow paint is taxiway and movement-area marking; white paint is runway marking; a red sign marks the boundary between them. For the full breakdown of the white paint on the runway side, our guide to what runway markings mean covers the threshold stripes, aiming point, and centerline in the same plain-English style, and what runway lights mean does the same for the lighting that takes over after dark.

Want to walk a real airport diagram before your next lesson and never freeze at an intersection again? Our free Total Student Pilot course teaches airport signs, markings, and lighting together so you arrive at the field already fluent in the language.

How do you actually read signs while taxiing?

Picture a student pilot taxiing out for the first solo. Ground says, “taxi to Runway 27 via Bravo, hold short of Runway 34.” That sounds like a lot until you let the signs do the work. The student finds the yellow direction sign at the first intersection, sees “B” with an arrow, and turns onto Bravo. A black location sign reading “B” with no arrow confirms the turn was correct.

A few hundred feet along, a red mandatory sign reading “16-34” appears beside yellow hold-short markings with the solid lines facing the student. It is a runway crossing, so the rule is automatic: the “hold short” clearance plus solid lines on this side means stop and confirm with ground before crossing. The student holds, ground clears the crossing, and the taxi continues. No guessing, no freezing, just reading the colors in order.

That is the whole skill: triage by color, confirm position with the black location sign, follow the yellow arrows, and treat every red sign as a hard stop until a clearance or a clear runway says otherwise. Brief the airport diagram before you taxi and the signs become confirmation of a plan you already have rather than a puzzle you solve on the move.

Quick-reference airport signs table

PLT Study Guide

The FAA tags Private Pilot knowledge-test questions with PLT (Pilot Learning Statement) codes. Airport signs sit squarely under one of them:

• PLT141 — Recall airport operations: markings / signs / lighting. This is the core code for everything in this article: the six sign types, their colors, what a mandatory sign requires, and how signs pair with hold-short markings. Expect questions that show a sign or describe its colors and ask what it means or what action it requires.

A note on a related code: PLT147 — Recall airport operations: visual glide path indicators covers VASI and PAPI systems, which are approach aids, not the taxiway and runway signs in this article, so it is not the right tag here despite both living under “airport operations.”

Study the canonical sources behind PLT141: AIM 2-3-8 through 2-3-13 (the six airport sign types, under AIM Section 3, Airport Marking Aids and Signs), AC 150/5340-18 (Standards for Airport Sign Systems), and Chapter 14 of the Pilot’s Handbook of Aeronautical Knowledge (FAA-H-8083-25C). If you can name the color and meaning of all six sign types and explain what to do at a red mandatory sign, you have this PLT code handled.

Frequently Asked Questions

FROM CHRIS

Airport signs feel like a foreign language for about a week, and then they click, and you wonder how the field ever looked confusing. The trick is to stop reading every sign as a wall of text and start reading the colors first: red stops you, black places you, yellow points you. Do that consistently and you will move around any airport in the country, day or night, like you have flown there for years.

Throttle On!

Chris Palmer

Founder & Chief CFI, Angle of Attack — Two-Time Master Aviation Educator and Gold Seal CFI