What is a PCI rating in airfield pavement management?
If you manage pavement on an airfield, you've filled out the FAA 5-year inspection form, and PCI is the number that drives most of what happens after. Pavement Condition Index is a 0-to-100 score that tells you how a section of runway, taxiway, or apron is holding up structurally and on the surface. A fresh overlay scores near 100. A taxiway with alligator cracking, raveling, and joint spalling working its way through the slab can drop into the 40s or lower. The number comes from a standard procedure, the same one every certified rater follows, so two inspectors looking at the same slab land close to the same score.
How PCI gets calculated
The method is ASTM D5340, Standard Test Method for Airport Pavement Condition Index Surveys. It breaks your pavement network into branches, sections, and sample units, typically 20 to 25 slabs for rigid pavement or a set area for flexible. A certified rater walks each sample unit, identifies every distress type present (corner breaks, longitudinal cracking, weathering, joint seal damage, and so on), records severity as low, medium, or high, and measures how much of the unit it affects.
Each distress gets a deduct value from a curve in the standard, and those deducts combine through a correction procedure to produce the sample unit's PCI. Section PCI is usually the average of its sample units, sometimes weighted if a unit looks a lot worse than its neighbors. The math is tedious enough that almost nobody does it by hand anymore.
Where PAVER fits in
PAVER is the software the Army Corps of Engineers and FAA have pushed for decades to handle that math and store the history. You log the distress survey data, PAVER runs the deduct curves and spits out section-by-section PCI, and it keeps a condition history you can trend year over year. It also runs the condition-prediction models most airports use to justify budget requests. If your airport has a pavement management plan on file, there's a good chance it was built or updated in PAVER.
The part that doesn't show up in the software is getting the distress data in the first place. A proper ASTM D5340 survey means a rater on foot, in every sample unit, measuring cracks with a tape and a crack comparator card. On a single-runway field that's a scheduling headache. On an active taxiway system at a mid-size commercial airport, that's coordinating with the tower, working around arrival banks, and sometimes paying for overnight access just to get boots on the slab.
PCI surveys at most airports run on a multi-year cycle rather than annually for that reason. The FAA baseline expects a full network survey roughly every three to five years, and a lot gets missed in the gap. A joint that was tight at the last inspection can open up, spall, and start letting water into the base course well before the next scheduled walk-through.
What an overhead read can and can't tell you
This is where Pavement Survey fits, and it's worth being precise about it. An annual overhead pass at 0.3 m GSD or finer picks up joint distress and surface degradation the way a rater would see it from directly above: spalling, raveling, cracking patterns, surface deterioration spreading across a panel or section. It doesn't replace the certified sample-unit walk that ASTM D5340 requires to generate an official PCI number, and it isn't trying to. What it does is show how your pavement is changing in the years between full surveys, without closing a runway or taxiway to put someone on foot out there.
If you're the one explaining to ops why a taxiway needs attention before its next scheduled PCI cycle, having an annual read of joint and surface condition to point to makes that conversation a lot shorter.
Ready to see what an overhead pass would catch on your own movement area? Get in touch about scheduling a Pavement Survey read for next season.