{ "currentVersion": 10.91, "id": 0, "name": "City Streets PCI (2019)", "type": "Feature Layer", "parentLayer": null, "defaultVisibility": true, "minScale": 0, "maxScale": 0, "canScaleSymbols": false, "geometryType": "esriGeometryPolyline", "description": "This centerline feature class contains pavement data for the roadways maintained by the City of Gaithersburg, MD. This includes IRI (AVG_IRI), rutting (RUT1, RUT2, representing rutting in each wheel path), PCI (Pavement Condition Index) for each segment, and the density percentage for each distress class (PCT_CLIMATE, PCT_STRUCTURAL and PCT_CONSTRUCTABLILITY). The Pavement Condition Index (PCI) was calculated utilizing VUEWorks® Asset Management Software (AMS). This AMS is based on the ASTM D6433 method of calculating a street segment\u2019s pavement condition index value. ASTM D6433 is based on a 0 to 100 rating scale where 0 represents a failed roadway condition and 100 represent an excellent roadway condition.Typical PCI score and associated conditions are as follows:86-100 = Good71-85 = Satisfactory56-70 = Fair41-55 = Poor26-40 = Very Poor11-25 = Serious0-10 = FailedThe International Roughness Index (IRI) is the roughness index most commonly obtained from measured longitudinal road profiles. It is calculated using a surface profiling system with units of slope (inches/mile)Typica IRI ranges are as follows:<=127 = Excellent128-154 = Good155-240 = Fair241-489 = Marginal490-625 = Poor>625 = Very PoorRutting is a surface depression in the wheel path. Rutting steams from a pavement deformation in any of the pavement layers or subgrades. This is usually caused by consolidated or lateral movement of the materials due to traffic load. 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