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The Highway Capacity Manual and AASHTO Geometric Design of Highways and Streets (\"Green Book\") list the following levels of service: A = Free flow, B = Reasonably free flow, C = Stable flow, D = Approaching unstable flow, E = Unstable flow, E Mitigated = Congestion should be mitigated (such as transit) when p.m. peak hour LOS falls below LOS \"E\", F = Forced or breakdown flow This dataset is used as a general reference layer for geographic information systems at the Washington State Department of Transportation, and is updated as needed.", "geometryType": "esriGeometryPolyline", "sourceSpatialReference": { "wkid": 2927, "latestWkid": 2927, "xyTolerance": 0.002, "zTolerance": 0.001, "mTolerance": 0.002, "falseX": -117498300, "falseY": -98850300, "xyUnits": 4000, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1000 }, "copyrightText": "Karena Houser, Community Transportation Planning Office, Washington State Department of Transportation", "parentLayer": null, "subLayers": [], 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