By M. Stroup-Gardiner
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Additional info for Constructing Smooth Hot Mix Asphalt (HMA) Pavements
These values need to be modified based on the statistical analysis of the recent smoothness. , Pavement Smoothness, Information Series 111, National Asphalt Pavement Association, l_amham, MD, 1991. , Champaign, IL, March 1997. , Measurement of Pavement Smoothness for Construction Quality Control, Report FHWA-AZ 92-217, Arizona Department of Transportation, Phoenix, AZ, Feb. 1992. , 1980. Sameh M. Zaghloul1 and Nicholas Vitillo2 Use of Automated Profilers to Replace NJDOT Rolling Straightedges Reference: Zaghloul, S.
This process involves both the highway agencies and contractors. Highway agencies always desire that contractors produce as smooth a pavement as possible. However, achieving high smoothness levels requires extra effort by the contractor during the construction process. More accurate paving equipment may be required. People in business for a profit are less likely to make that effort without a monetary incentive. Therefore, a smoothness-based specification that would set a goal for smoothness and then pay the contractors extra money - above the contract amount for meeting that goal - would be necessary.
24 m/km are adopted in the current ADOT smoothness specification for category 2, divided highway projects with only one leveling opportunity (ACFC/ARACFC so far), and category 5, non-divided highway projects with only friction course. 717 m/kin for category 2 and 5, respectively. It seems that the window values in the current specification are high for category 5. 24 m/km are adopted in the current ADOT smoothness specification for category 3, non-divided highway projects with two or more leveling opportunities, and category 6, non-divided highway projects with only AC overlay.