#### § 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)](/on/2024-08-12/title-23/section-460.2#p-460.2(c)).

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

| MIRE name (MIRE No.)1 | |
| --- | --- |
| Roadway segment | Intersection |
| Segment Identifier (12) | Unique Junction Identifier (120). |
| Route Number (8)2 | Location Identifier for Road 1 Crossing Point (122). |
| Route/street Name (9)2 | Location Identifier for Road 2 Crossing Point (123). |
| Federal Aid/Route Type (21)2 | Intersection/Junction Geometry (126). |
| Rural/Urban Designation (20)2 | Intersection/Junction Traffic Control (131). |
| Surface Type (23)2 | AADT (79) [for Each Intersecting Road]. |
| Begin Point Segment Descriptor (10)2 | AADT Year (80) [for Each Intersecting Road]. |
| End Point Segment Descriptor (11)2 | |
| Segment Length (13)2 | |
| Direction of Inventory (18) | Unique Approach Identifier (139). |
| Functional Class (19)2 | |
| Median Type (54) | |
| Access Control (22)2 | |
| One/Two-Way Operations (91)2 | Interchange/Ramp. |
| Number of Through Lanes (31)2 | Unique Interchange Identifier (178). |
| Average Annual Daily Traffic (79)2 | Location Identifier for Roadway at Beginning Ramp Terminal (197). |
| AADT Year (80)2 | Location Identifier for Roadway at Ending Ramp Terminal (201). |
| Type of Governmental Ownership (4)2 | Ramp Length (187). |
| | Roadway Type at Beginning Ramp Terminal (195). |
| | Roadway Type at Ending Ramp Terminal (199). |
| | Interchange Type (182). |
| | Ramp AADT (191).2 |
| | Year of Ramp AADT (192).2 |
| | Functional Class (19).2 |
| | Type of Governmental Ownership (4).2 |
| | |
| --- | --- |
| 1 *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>.* | |
| 2 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. | |

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

| MIRE name (MIRE No.)1 |
| --- |
| Roadway segment: |
| Segment Identifier (12). |
| Functional Class (19).2 |
| Surface Type (23).2 |
| Type of Governmental Ownership (4).2 |
| Number of Through Lanes (31).2 |
| Average Annual Daily Traffic (79).2 |
| Begin Point Segment Descriptor (10).2 |
| End Point Segment Descriptor (11).2 |
| Rural/Urban Designation (20).2 |
| |
| --- |
| 1 *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>.* |
| 2 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. |

Table 3—MIRE Fundamental Data Elements for Unpaved Roads

| MIRE name (MIRE No.)1 |
| --- |
| Roadway segment: |
| Segment Identifier (12). |
| Functional Class (19).2 |
| Type of Governmental Ownership (4).2 |
| Begin Point Segment Descriptor (10).2 |
| End Point Segment Descriptor (11).2 |
| |
| --- |
| 1 *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>.* |
| 2 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. |