14 CFR § 91.125 - ATC light signals.

---
identifier: "/us/cfr/t14/s91.125"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 91.125 - ATC light signals."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "91.125"
section_name: "ATC light signals."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "F"
subchapter_name: "AIR TRAFFIC AND GENERAL OPERATING RULES"
part_number: "91"
part_name: "GENERAL OPERATING AND FLIGHT RULES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(f), 40101, 40103, 40105, 40113, 40120, 44101, 44111, 44701, 44704, 44709, 44711, 44712, 44715,44716, 44717, 44722, 44740, 46306, 46315, 46316, 46504, 46506-46507, 47122, 47508,47528-47531, 47534; Pub. L. 112-95, 126 Stat. 11; Pub. L. 114-190, 130 Stat. 615 (49 U.S.C. 44703 note); sec. 828, Pub. L. 118-63, 138 Stat. 1330 (49 U.S.C. 44703 note); articles 12 and 29 of the Convention on International Civil Aviation, 61 Stat. 1180."
cfr_part: "91"
---


# 91.125 ATC light signals.

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. |