{"data":{"id":"us/23-cfr-924.17","jurisdiction":"us","citation":"23 CFR 924.17","heading":"MIRE fundamental data elements.","body":"The MIRE fundamental data elements shall be collected on all public roads, as listed in Tables 1, 2, and 3 of this section. For the purpose of MIRE fundamental data elements applicability, the term open to public travel is consistent with 23 CFR 460.2(c).\nTable 1—MIRE Fundamental Data Elements for Non-Local (Based on Functional Classification) Paved Roads\nMIRE name (MIRE No.) 1\nRoadway segment Intersection\nSegment Identifier (12) Unique Junction Identifier (120).\nRoute Number (8) 2 Location Identifier for Road 1 Crossing Point (122).\nRoute/street Name (9) 2 Location Identifier for Road 2 Crossing Point (123).\nFederal Aid/Route Type (21) 2 Intersection/Junction Geometry (126).\nRural/Urban Designation (20) 2 Intersection/Junction Traffic Control (131).\nSurface Type (23) 2 AADT (79) [for Each Intersecting Road].\nBegin Point Segment Descriptor (10) 2 AADT Year (80) [for Each Intersecting Road].\nEnd Point Segment Descriptor (11) 2\nSegment Length (13) 2\nDirection of Inventory (18) Unique Approach Identifier (139).\nFunctional Class (19) 2\nMedian Type (54)\nAccess Control (22) 2\nOne/Two-Way Operations (91) 2 Interchange/Ramp.\nNumber of Through Lanes (31) 2 Unique Interchange Identifier (178).\nAverage Annual Daily Traffic (79) 2 Location Identifier for Roadway at Beginning Ramp Terminal (197).\nAADT Year (80) 2 Location Identifier for Roadway at Ending Ramp Terminal (201).\nType of Governmental Ownership (4) 2 Ramp Length (187).\nRoadway Type at Beginning Ramp Terminal (195).\nRoadway Type at Ending Ramp Terminal (199).\nInterchange Type (182).\nRamp AADT (191).2\nYear of Ramp AADT (192).2\nFunctional Class (19).2\nType of Governmental Ownership (4).2\n1 Model Inventory of Roadway Elements—MIRE, Version 1.0, Report No. FHWA-SA-10-018, October 2010, http://safety.fhwa.dot.gov/tools/data_'tools/mirereport/mirereport.pdf.\n2 Highway Performance Monitoring System full extent elements are required on all Federal-aid highways and ramps located within grade-separated interchanges, i.e., National Highway System (NHS) and all functional systems excluding rural minor collectors and locals.\nTable 2—MIRE Fundamental Data Elements for Local (Based on Functional Classification) Paved Roads\nMIRE name (MIRE No.) 1\nRoadway segment:\nSegment Identifier (12).\nFunctional Class (19).2\nSurface Type (23).2\nType of Governmental Ownership (4).2\nNumber of Through Lanes (31).2\nAverage Annual Daily Traffic (79).2\nBegin Point Segment Descriptor (10).2\nEnd Point Segment Descriptor (11).2\nRural/Urban Designation (20).2\n1 Model Inventory of Roadway Elements—MIRE, Version 1.0, Report No. FHWA-SA-10-018, October 2010, http://safety.fhwa.dot.gov/tools/data_tools/mirereport/mirereport.pdf.\n2 Highway Performance Monitoring System full extent elements are required on all Federal-aid highways and ramps located within grade-separated interchanges, i.e., National Highway System (NHS) and all functional systems excluding rural minor collectors and locals.\nTable 3—MIRE Fundamental Data Elements for Unpaved Roads\nMIRE name (MIRE No.) 1\nRoadway segment:\nSegment Identifier (12).\nFunctional Class (19).2\nType of Governmental Ownership (4).2\nBegin Point Segment Descriptor (10).2\nEnd Point Segment Descriptor (11).2\n1 Model Inventory of Roadway Elements—MIRE, Version 1.0, Report No. FHWA-SA-10-018, October 2010, http://safety.fhwa.dot.gov/tools/data_tools/mirereport/mirereport.pdf.\n2 Highway Performance Monitoring System full extent elements are required on all Federal-aid highways and ramps located within grade-separated interchanges, i.e., National Highway System (NHS) and all functional systems excluding rural minor collectors and locals.","path":["Title 23—Highways","CHAPTER I—FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER J—HIGHWAY SAFETY","PART 924—HIGHWAY SAFETY IMPROVEMENT PROGRAM"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-23.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:50Z","sha256":"b82838c7f9c53d781e0e98cb01a348498d458b8dbf6cca982da1c1bd1088e76d","source_id":"us-cfr","stale":true,"prev":"us/23-cfr-924.15","next":"us/23-cfr-940.1"},"notice":"GroundRules: Original legal text. Not legal advice."}