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It supports transportation planners, engineers, and researchers in assessing corridor functionality and system efficiency. The data is maintained and updated annually as part of ITD\u2019s Highway Performance Monitoring System (HPMS) submittal process to the Federal Highway Administration (FHWA) and is verified against roadway design records and the official state highway network. Users should note that access control classifications represent the current operational status of the roadway and may change over time as corridors are upgraded or reclassified. These are current \"working\" records. 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