One the severity has been identified, the distress is recorded as one slab. If two medium severity cracks are within one slab, the slab is counted as having one high-severity crack. Slabs divided into four or more pieces are counted as divided slabs. Slabs longer than 29-1/2 ft (9 m) are divided into ‘virtual slabs’ of approximately equal length, with joints assumed to be in perfect condition.