SECTION 402 - PAVEMENT SMOOTHNESS
402.00 Smoothness Projects Projects to have their pavement smoothness analyzed in
accordance with this Specification will be so noted in Special Provision 403 - Hot Mix Asphalt Pavement. 4-26
402.01 Pavement Smoothness The final pavement surface shall be evaluated for
smoothness using a Class I or Class II profiler as defined by ASTM E950 (94). Smoothness measurements will be expressed in terms of the International Roughness Index (IRI) as defined by the World Bank, in units of inches/mile.
402.02 Lot Size Lot size for smoothness will be 3000 lane-feet. A sublot will consist of
50 lane-feet. Partial lots will be included in the previous lot if less than one-half the size of a normal lot. If equal to or greater than one-half the normal lot size, it will be tested as a separate lot.
402.03 Acceptance Testing The Department will conduct Acceptance testing following
completion of the surface course. Sections to be excluded from testing include the following: Bridge decks and joints (no smoothness measurements will be taken within 100 ft of bridge joints) Acceleration and deceleration lanes Shoulders and ramps Side streets and roads Within 100 ft of transverse joints at the beginning and end of the project Within 100 ft of railroad crossings Urban areas with speed limits of 30 mph or lower Each lot shall have 2 measurements made in each wheel path. The average of the 4 measurements will determine the smoothness for that lot. The smoothness measurements will be statistically evaluated for pay factors as described in Subsection 106.7 - Quality Level Analysis, using the specification limits shown below. TABLE 1: ACCEPTANCE LIMITS Level USL I 50 in/mile II 60 in/mile III 70 in/mile Computation of Smoothness Pay Adjustment: PA = (PF-1.0)(Q)(P) where: Q = Quantity of surface course in the Lot (excluding shoulders, side streets, bridge decks, ramps, acceleration and deceleration lanes) PF = smoothness pay factor for the Lot P = Contract unit price for surface pavement PA = pay adjustment
402.04 Unacceptable Work In the event that any Lot is found to have a pay factor
less than 0.80, the Contractor shall take whatever remedial action is required to correct the 4-27 pavement surface in that Lot at no additional expense to the Department. Such remedial action may include but is not limited to removal and replacement of the unacceptable pavement. In the event remedial action is necessary, the Contractor shall submit a written plan to the Resident outlining the scope of the remedial work. The Resident must approve this plan before the remedial work can begin. Following remedial work, the Lot shall be retested, and will be subject to the specification limits listed above. The resulting pay factor, if within the acceptable range, will be used in the final pay adjustment. The Contractor shall pay the cost of retesting the pavement following corrective action. Localized surface tolerance defects will be subject to the provisions outlined in Section
401.11 Surface Tolerances.
Payment will be made under: Pay Item P a y U n i t
402.10 Incentive/Disincentive - Pavement Smoothness Lump Sum
Pavement Smoothness in other states
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