Reflection Cracking at Joints
Description
Cracks in asphalt concrete overlay surfaces that occur over joints in concrete pavements.
Note: The slab dimensions beneath the AC surface must be known to identify reflection cracks at joints.
Severity Levels
Low
An unsealed crack with a mean width ≤ 6 mm; or a sealed crack with sealant material in good condition and with a width that cannot be determined.
Moderate
Any crack with a mean width > 6 mm and ≤ 19 mm; or any crack with a mean width ≤ 19 mm and adjacent low severity random cracking.
High
Any crack with a mean width > 19 mm; or any crack with a mean width ≤ 19 mm and adjacent moderate to high severity random cracking.
Cracking at Joints
How to Measure
Recorded as longitudinal cracking (ACP4) or transverse cracking (ACP6) on
LTPP surveys.
