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This dataset contains the Roads and Highways Road Network Linear Referencing System (LRS) HPMS grade event polyline feature class which identifies roadway grade information for Idaho’s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data supports roadway design, safety analysis, and performance modeling by describing the longitudinal slope of the roadway surface. |
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This dataset contains the Roads and Highways Road Network Linear Referencing System (LRS) HPMS grade event polyline feature class which identifies roadway grade information for Idaho’s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data supports roadway design, safety analysis, and performance modeling by describing the longitudinal slope of the roadway surface. |
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This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications. |
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5000 |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS grade event polyline feature class represents the longitudinal slope, or steepness, of a roadway segment. Grade is a key geometric characteristic that influences vehicle performance, fuel consumption, drainage, and roadway safety. It is expressed as a percentage based on the rise or fall in elevation over a given horizontal distance. </SPAN></P><P><SPAN>Grade information is derived from roadway centerline geometry, design plans, and digital elevation data maintained in ITD’s roadway inventory and HPMS systems. Both upgrade (positive) and downgrade (negative) values are recorded to indicate direction of slope relative to increasing route mile point. </SPAN></P><P><SPAN>This dataset is used by engineers, planners, and safety analysts to evaluate roadway performance, assess design compliance, and identify locations where steep grades may affect vehicle operations or maintenance needs. Grade data is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) reporting to the Federal Highway Administration (FHWA). </SPAN></P><P><SPAN STYLE="font-weight:bold;">These are current "working" records. For the static, published data, please see the records stored at: </SPAN><A href="https://www.fhwa.dot.gov/policyinformation/hpms.cfm" STYLE="text-decoration:underline;"><SPAN>https://www.fhwa.dot.gov/policyinformation/hpms.cfm</SPAN></A></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Spatial Data Disclaimer - The Idaho Transportation Department (ITD) provides this geographic data any any associated metadata "as is" without warranty of any kind, including but not limited to its completeness, fitness for a particular use, or accuracy of its content, positional or otherwise. It is the sole responsibility of the user to determine the usability of the data for their purposes. In no event shall ITD have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind arising out of the use of or reliance on the geographic data or metadata. In providing this data or access to it, ITD assumes no obligation to assist the user in the use of such data or in the development, use, or maintenance or any applications applied to or associated with the data or metadata.</SPAN></P></DIV></DIV></DIV> |
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Roads and Highways - HPMS Grade |
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["Transportation","Roads and Highways","Linear Referencing System","LRS","Road Network","Highway Performance Monitoring System","HPMS"] |
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en-US |
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20000000 |
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