PA.II.D.K6cFAA-S-ACS-6C · Nov 2023Knowledge

c. Entering or crossing runways

ACS element text (the applicant demonstrates understanding of)

Procedures for: c. Entering or crossing runways

Bottom line

Do not enter a runway at a towered airport unless instructions are given from ATC to cross, takeoff from, or “line up and wait” on that specific runway. Scan the full length of the runway and the final approaches before entering or crossing any runway, even if ATC has issued a clearance.

Key numbers

Key numbers for c. Entering or crossing runways
NumberWhat it means
explicit clearance for all runway crossingsCrossing rule
one runway crossing at a timeOne at a time
less than 1,000 feet between centerlinesException spacing
active, inactive, or closedAll runways

FAA references

  1. AIM 4-3-18 (Taxiing) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  2. PHAK ch. 14 (p. 14-33) — FAA-H-8083-25C (2023)
  3. PHAK ch. 14 (p. 14-34) — FAA-H-8083-25C (2023)
  4. AIM 4-3-21 (Exiting the Runway After Landing) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  5. AIM 2-1-6 (Runway Status Light (RWSL) System) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  6. AIM 4-4-15 (Use of Visual Clearing Procedures and Scanning Techniques) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  7. AFH ch. 13 (p. 13-15) — FAA-H-8083-3C
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