Pavement Inspection

Lane/Shoulder Drop-Off

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 Description
Low The difference in elevation between the pavement edge and shoulder is between 1 and 2 in (25 and 50 mm).
Medium The difference in elevation is between 2 and 4 in (50 and 100 mm).
High The difference in elevation is greater than 4 in (100 mm).