23 CFR § 924.17 - MIRE fundamental data elements.

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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

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

1Model 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

1Model 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

1Model 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.