What I can say
- Airport operators assess and report runway surface conditions using their own procedures, and the FAA’s materials describe the Runway Condition Assessment Matrix (RCAM). I do not summarise it here, and I make no claim about its link to edges.
- I did not find, in the sources read, any study measuring the effect of edge wear on friction or reported condition.
What is plausible but not shown
The mechanism is plausible; the measurement is not in the reports.
- A worn or damaged edge may leave more contaminant on the surface after a pass.
- More contaminant may affect the surface condition assessed afterwards.
- Many other factors also act: temperature, precipitation, treatment, timing and traffic.
How a team could look for a link
| Step | What to record | Why |
|---|---|---|
| 1. Log edge condition | Edge wear reading and hours for each plow used on the runway | Gives the edge side of the comparison |
| 2. Log passes | Time, plow, pass sequence | Links passes to later assessments |
| 3. Log assessments | Time and the airport’s own reported condition and any measurements | Gives the report side |
| 4. Log conditions | Weather, temperature, treatment applied | Controls for other causes |
| 5. Review | After a season, see whether poorer reports follow passes by worn edges, accounting for conditions | Tests the idea |
What to do meanwhile
The practical response does not depend on settling the question.
- Keep edges within your supplier’s limits and change them promptly.
- Share edge condition with the people who assess surfaces, so that they know when a pass was made with a poor edge.
- Do not claim an effect on friction in any bid or report without data.
Limits
Airport procedures differ, and the data above would need careful analysis. Treat the table as a way to start collecting evidence.
Why not guess
A claim that edges affect friction readings, if wrong, could mislead decisions about runway safety. It is better to say we do not know, and to collect evidence.
Boundary: No friction value, RCAM content or study is cited, and no link between edge wear and reported conditions is claimed.
Further reading on this site.
Friction Measurement and Surface Condition Reporting on Runways ↗Protecting Concrete From De-Icing Chemicals: What Facility Managers Should Know ↗Carbide snow plow blades ↗Airport Snow and Ice Control Plan: Equipment Readiness Questions ↗Reading an Airport Snowplow Bid: Edge Clauses to Look For ↗Mid-Event Edge Check on Airfield Plows: A Three-Minute Stop List ↗
