TM 5-623
Figure B-33. High-severity joint reflection cracking.
1. Any crack, filled or nonfilled, surrounded by medium- or high-severity random
cracking.
2. Nonfilled cracks over 3 inches.
3. A crack of any width where a few inches of pavement around a crack is severely
broken. (Crack is severely broken.)
How to Measure:
Joint reflection cracking is measured in linear feet. The length and severity level of
each crack should be recorded separately. For example, a crack that is 50 feet
long may have 10 feet of high severity; these would all be recorded separately. If
a bump occurs at the reflection crack, it is also recorded.
Name of Distress:
Lane/Shoulder Drop Off.
Description:
Lane/shoulder drop off is a difference in elevation between the pavement edge and the
shoulder. This distress is caused by shoulder erosion, shoulder settlement, or by
building up the roadway without adjusting the shoulder level.
Severity Levels:
L-The difference in elevation between the pavement edge and shoulder is 1 to 2 inches
(fig B-34).
B-13
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