{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "This dataset contains the Roads and Highways Road Network Linear Referencing System (LRS) HPMS median event polyline feature class which provides information on the presence and type of medians for Idaho\u2019s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data supports roadway design, access control, and safety analysis by identifying the physical features that separate opposing traffic flows.", "description": "

The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS median event polyline feature class identifies the type of median separating opposing lanes of traffic along divided highways. Medians improve safety and operations by reducing head-on collisions, minimizing interference from opposing traffic, and providing space for recovery, emergency stops, and potential future lanes. <\/SPAN><\/P>

This information is collected from roadway design plans, construction as-built documents, and ITD\u2019s roadway inventory systems in accordance with FHWA HPMS Field Manual coding guidance. Each median is classified by physical type and barrier characteristics. <\/SPAN><\/P>

Medians may include unprotected areas, curbed separators, or positive barriers that prevent vehicle crossover. Optional sub-codes describe the rigidity of barrier types (flexible, semi-rigid, or rigid) when that level of detail is available. <\/SPAN><\/P>

The dataset supports roadway safety evaluation, network inventory, and performance reporting. It is maintained and updated annually as part of ITD\u2019s Highway Performance Monitoring System (HPMS) submission to the Federal Highway Administration (FHWA). <\/SPAN><\/P>

These are current \"working\" records. For the static, published data, please see the records stored at: <\/SPAN>https://www.fhwa.dot.gov/policyinformation/hpms.cfm<\/SPAN><\/A><\/P><\/DIV><\/DIV><\/DIV>", "summary": "This dataset contains the Roads and Highways Road Network Linear Referencing System (LRS) HPMS median event polyline feature class which provides information on the presence and type of medians for Idaho\u2019s public roadway segments as reported through the Highway Performance Monitoring System (HPMS). The data supports roadway design, access control, and safety analysis by identifying the physical features that separate opposing traffic flows.", "title": "Roads and Highways - HPMS Median", "tags": [ "Transportation", "Roads and Highways", "Linear Referencing System", "LRS", "Road Network", "Highway Performance Monitoring System", "HPMS" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 20000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "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.", "licenseInfo": "

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>", "portalUrl": "" }