Restoration of frictional characteristics on older Portland cement concrete pavement.
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1986-06-01
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Edition:Final report.
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Abstract:Safety is a very important aspect o f the highway program. The Iowa DOT
initiated an inventory of the friction values of all paved primary
roadways i n 1969. This inventory, with an ASTM E-274 test unit, has
continued to the present time. The t e s t i n g frequency varies based upon
traffic volume and the previous friction value.
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