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A flexible pavement, with accumulated traffic loads and time in service, may suffer one or more of the

following deficiencies:

1. Excessive rutting

2. Excessive cracking

3. Inadequate ride quality

4. Inadequate skid resistance of surface

In some cases, a pavement may be adequately maintained and may not have the above-listed deficiencies,

but the pavement may have the following problems:

1. Excessive maintenance costs

2. Inadequate structural capacity for the expected future traffic loads.