Regulation · 14 CFRCurrent as of October 14, 2026 (eCFR)
14 CFR 91.125 ATC light signals
Subpart B—Flight Rules
A reference copy of the official regulation text for study. It is not legal advice or an FAA interpretation; always confirm against the current official source.
ATC light signals have the meaning shown in the following table:
| Color and type of signal | Meaning with respect to aircraft on the surface | Meaning with respect to aircraft in flight |
|---|---|---|
Steady green | Cleared for takeoff | Cleared to land. |
Flashing green | Cleared to taxi | Return for landing (to be followed by steady green at proper time). |
Steady red | Stop | Give way to other aircraft and continue circling. |
Flashing red | Taxi clear of runway in use | Airport unsafe—do not land. |
Flashing white | Return to starting point on airport | Not applicable. |
Alternating red and green | Exercise extreme caution | Exercise extreme caution. |
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