23 CFR § 924.17 - MIRE fundamental data elements.

---
identifier: "/us/cfr/t23/s924.17"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "23 CFR § 924.17 - MIRE fundamental data elements."
title_number: 23
title_name: "Highways"
section_number: "924.17"
section_name: "MIRE fundamental data elements."
chapter_name: "FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "J"
subchapter_name: "HIGHWAY SAFETY"
part_number: "924"
part_name: "HIGHWAY SAFETY IMPROVEMENT PROGRAM"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "23 U.S.C. 104(b)(3), 130, 148, 150, and 315; 49 CFR 1.85."
regulatory_source: "81 FR 13739, Mar. 15, 2016, unless otherwise noted."
cfr_part: "924"
---


# 924.17 MIRE fundamental data elements.

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).

Table 1—MIRE Fundamental Data Elements for Non-Local (Based on Functional Classification) Paved Roads

| Roadway segment | Intersection |
| --- | --- |
| Segment Identifier (12) | Unique Junction Identifier (120). |
| Route Number (8) | Location Identifier for Road 1 Crossing Point (122). |
| Route/street Name (9) | Location Identifier for Road 2 Crossing Point (123). |
| Federal Aid/Route Type (21) | Intersection/Junction Geometry (126). |
| Rural/Urban Designation (20) | Intersection/Junction Traffic Control (131). |
| Surface Type (23) | AADT (79) [for Each Intersecting Road]. |
| Begin Point Segment Descriptor (10) | AADT Year (80) [for Each Intersecting Road]. |
| End Point Segment Descriptor (11) |  |
| Segment Length (13) |  |
| Direction of Inventory (18) | Unique Approach Identifier (139). |
| Functional Class (19) |  |
| Median Type (54) |  |
| Access Control (22) |  |
| One/Two-Way Operations (91) | Interchange/Ramp. |
| Number of Through Lanes (31) | Unique Interchange Identifier (178). |
| Average Annual Daily Traffic (79) | Location Identifier for Roadway at Beginning Ramp Terminal (197). |
| AADT Year (80) | Location Identifier for Roadway at Ending Ramp Terminal (201). |
| Type of Governmental Ownership (4) | Ramp Length (187). |
|  | Roadway Type at Beginning Ramp Terminal (195). |
|  | Roadway Type at Ending Ramp Terminal (199). |
|  | Interchange Type (182). |
|  | Ramp AADT (191). |
|  | Year of Ramp AADT (192). |
|  | Functional Class (19). |
|  | Type of Governmental Ownership (4). |
| Report No. FHWA-SA-10-018, October 2010, |  |
| Highway Performance Monitoring System full extent elements are required on all Federal-aid highways and ramps located within grade-separated interchanges,  National Highway System (NHS) and all functional systems excluding rural minor collectors and locals. |  |

Table 2—MIRE Fundamental Data Elements for Local (Based on Functional Classification) Paved Roads

| MIRE name (MIRE No.) |
| --- |
| Roadway segment: |
| Segment Identifier (12). |
| Functional Class (19). |
| Surface Type (23). |
| Type of Governmental Ownership (4). |
| Number of Through Lanes (31). |
| Average Annual Daily Traffic (79). |
| Begin Point Segment Descriptor (10). |
| End Point Segment Descriptor (11). |
| Rural/Urban Designation (20). |
| Report No. FHWA-SA-10-018, October 2010, |
| Highway Performance Monitoring System full extent elements are required on all Federal-aid highways and ramps located within grade-separated interchanges,  National Highway System (NHS) and all functional systems excluding rural minor collectors and locals. |

Table 3—MIRE Fundamental Data Elements for Unpaved Roads

| MIRE name (MIRE No.) |
| --- |
| Roadway segment: |
| Segment Identifier (12). |
| Functional Class (19). |
| Type of Governmental Ownership (4). |
| Begin Point Segment Descriptor (10). |
| End Point Segment Descriptor (11). |
| Report No. FHWA-SA-10-018, October 2010, |
| Highway Performance Monitoring System full extent elements are required on all Federal-aid highways and ramps located within grade-separated interchanges,  National Highway System (NHS) and all functional systems excluding rural minor collectors and locals. |