Local Road Management Manual 366 Narrow ‘N” ≤ 3mm average crack width Wide ‘W’ > 3mm average crack width The severity is predominant severity. EXTENT The length of cracks is recorded in meters for Longitudinal and Transverse cracks. The length of Crocodile cracks is recorded in meters per band width. 3.1.5. Pavement Rutting (Flexible Pavement) Assessed over total area of segment Rutting is defined as a longitudinal depression that forms in the wheel paths of a road under traffic loading. Rut depth is defined as the maximum surface level variation measured from an imaginary line between two points on the surface at a spacing of 1.2 m (measured using a 1.2 m straight edge and a wedge - see illustration). Measurements are taken on the inner and outer wheel paths. Illustration 3.1.5: Wooden Straight Edge and