PA.II.D.K3FAA-S-ACS-6C · Nov 2023Knowledge
Airport markings, signs, and lights.
Airport markings, signs, and lights.
Bottom line
Airport markings and signs provide directions and assist pilots in airport operations. Know and use all of the visual aids available at the airport, such as the signs, markings, and lighting, as well as ground and/or tower ATC, to follow the taxi route.
Key numbers
| Number | What it means |
|---|---|
| White until last 3,000 feet of runway, viewed from the landing threshold | Centerline lights |
| Up to 150 feet prior to a runway holding position marking | Enhanced centerline |
| Yellow crosses at each end and at 1,000 foot intervals when permanently closed | Closed runway |
| 6 inches (15 cm) to 12 inches (30 cm) in width | Taxiway centerline |
FAA references
- PHAK ch. 14 (p. 14-5) — FAA-H-8083-25C (2023)
- AC 91-73, para. 7d — AC No: 91-73B
- AFH Glossary (p. G-13) — FAA-H-8083-3C
- AIM 2-3-4 (Taxiway Markings) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
- AIM 2-3-6 (Other Markings) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
- AIM 2-3-3 (Runway Markings) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
- AC 91-73, paras. 7g, 7h — AC No: 91-73B
- AC 91-73 Appendix 1 — AC No: 91-73B
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