Definition
A numerical value, transmitted by air traffic control to pilots, describing the braking action available on a runway. The number is derived from a ground vehicle's measured friction reading on the runway surface and is most commonly used at military airfields and during winter operations when runway contamination (snow, slush, ice) reduces braking effectiveness.
Plain English
A number passed to the pilot that tells them how much grip the runway has for stopping. Higher numbers mean better braking; lower numbers mean a slipperier runway.
Context Anchor
A pilot may hear a Runway Condition Reading from air traffic control when operating at a military field or certain civil airports, especially when the runway is wet, icy, snowy, or otherwise slippery.
Derivation
The phrase is descriptive: a 'reading' (a measurement) of the runway's 'condition.' The reading itself is taken by a friction-measuring vehicle driven along the runway.
Why Pilots Care
Determines required landing distance and whether operations can continue safely.
Intuition Check
Do not read this as a general comment like “the runway looks okay.” A Runway Condition Reading is a specific reported number tied to measured runway braking condition.
Example Sentence 1
Tower reported an RCR of 12, so the crew rechecked their landing distance numbers before continuing the approach.
Example Sentence 2
Low runway condition readings prompted the airport to close the runway for snow removal.