Laserfiche WebLink
Edge Cracking — Running parallel to the <br />road and usually within 1 to 2 feet of the <br />outer edge of the pavement, this distress is <br />caused by traffic loading and weakened <br />base conditions resulting from poor <br />drainage. It is measured in linear feet. <br />R <br />Distortion —This includes various localized <br />unevenness in the surface of the pavement <br />including bumps and sags, depressions, <br />swell, corrugation, or shoving. This distress <br />can be caused by a number of factors, <br />including construction issues, subgrade <br />failure, mixture failure, environmental <br />influence, etc. <br />Weathering —This is the wearing away of <br />asphalt binder and fine aggregate matrix, <br />which is quantified by severity and square <br />footage. <br />Ride Index (RI) <br />The Ride Index (RI) gives a measure of ride quality and is recorded following the industry -standard ASTM <br />E1926 for determination of International Roughness Index (IRI). This value is generated from the <br />longitudinal profile measured by the LCMS as it records the change in elevation over a distance. Once <br />calculated it is expressed as a slope and reported in millimeters/meter (mm/m). Common IRI levels for <br />new, older, and damaged pavements are displayed in Figure 7. <br />IMS Pavement Management Report Louisville, CO 2022 Page 1 11 <br />