MIRE Safety Data Elements
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MIRE, the Model Inventory of Roadway Elements, is a recommended listing of roadway inventory and traffic elements critical to safety management. MIRE is intended as a guideline to help transportation agencies improve their roadway and traffic data inventories.
MIRE Program at FHWA: https://safety.fhwa.dot.gov/rsdp/downloads/fhwasa17048.pdf
MIRE Reference (latest version - 2.0): https://safety.fhwa.dot.gov/rsdp/downloads/fhwasa17048.pdf
Fundamental Data Elements (FDE)
| ELEMENT NAME | ELEMENT NUMBER (MIRE 1.0) | ELEMENT NUMBER (MIRE 2.0) | ELEMENT TYPE | DESCRIPTION | DATASET(S) | ATTRIBUTE NAME / GUIDANCE |
|---|---|---|---|---|---|---|
| Segment Identifier (12) | 12 | 12 | Roadway Segment | Unique segment identifier | Roadway Subblock, Roadway Block, LRS Roadway | RouteID |
| Unique Junction Identifier (120) | 120 | 110 | Intersection | Roadway Subblock Intersection | IntersectionID | |
| Unique Interchange Identifier (178) | 178 | 168 | Interchange/Ramp | NOT AVAILABLE | NOT AVAILABLE | |
| Route Number (8) | 8 | 8 | Roadway Segment | The signed route number | LRS Route Number | ROUTE_NUMBER |
| Location Identifier for Road 1 Crossing Point (122) | 122 | 112 | Intersection | Location of the center of the junction on the first intersecting route (e.g. route-milepost). Note that if the Junction File is a spatial data file, this would be the coordinates and would be the same for all crossing roads. | Roadway Subblock Intersection | SHAPE@XY |
| Location Identifier for Roadway at Beginning Ramp Terminal (197) | 197 | 187 | Interchange/Ramp | Roadway Subblock, Roadway Block, LRS Roadway ROADTYPE = 3 | SHAPE@XY | |
| Route/street Name (9) | 9 | 9 | Roadway Segment | The route or street name, where different from Element 8. Route Number. | Roadway Subblock, Roadway Block, LRS Roadway | Route Name |
| Location Identifier for Road 2 Crossing Point (123) | 123 | 113 | Intersection | Location of the center of the junction on the second intersecting route (e.g. route-milepost). Note that in a spatial data system, this would be the same as Element 112. Location Identifier for Road 1 Crossing Point. Not applicable if intersecting route is not an inventoried road (i.e., a railroad or bicycle path). | Roadway Subblock Intersection | SHAPE@XY |
| Location Identifier for Roadway at Ending Ramp Terminal (201) | 201 | 191 | Interchange/Ramp | Location on the roadway at the ending ramp terminal (e.g. route-milepost for that roadway) if the ramp connects with a roadway at that point. | Roadway Subblock, Roadway Block, LRS Roadway ROADTYPE = 3 | SHAPE@XY |
| Federal Aid (21) | 21 | 21 | Roadway Segment | Indicate the system on which the route is located. | Roadway Subblock, Roadway Block DCFUNCTIONALCLASS IN (14, 17, 19) | Guidance Functional class attribute is used as a filter to find if a route is Federal Aid |
| Route Type (21) | 21 | 22 | Roadway Segment | Federal-aid/NHS route type. | Roadway Subblock, Roadway Block DCFUNCTIONALCLASS IN (14, 17, 19) | Guidance Functional class attribute is used as a filter to find if a route is Route Type |
| Intersection/Junction Geometry (126) | 129 | 116 | Intersection | Roadway Subblock Intersection | SHAPE@XY | |
| Ramp Length (187) | 187 | 177 | Interchange/Ramp | ROADTYPE = 3 | SHAPE.LEN (Meters) | |
| Rural/Urban Designation (20) | 20 | 20 | Roadway Segment | N/A | DC is fully urban, so this is not relevant | |
| Intersection/Junction Traffic Control (131) | 131 | 121 | Intersection | GRADE | ||
| Roadway Type at Beginning Ramp Terminal (195) | 195 | 185 | Interchange/Ramp | A ramp is described by a beginning and ending ramp terminal in the direction of ramp traffic flow or the direction of inventory. This element describes the type of roadway intersecting with the ramp at the beginning terminal. | LRS Subblocks + LRS Intersection Approaches DATABASE ONLY | Guidance
|
| Surface Type (23) | 23 | 24 | Roadway Segment | SURFACE_TYPE | ||
| AADT (79) [for Each Intersecting Road] | 79 | 81 | Intersection | Roadway Subblock, Roadway Block, LRS AADT | AADT | |
| Roadway Type at Ending Ramp Terminal (199) | 199 | 189 | Interchange/Ramp | A ramp is described by a beginning and ending ramp terminal in the direction of inventory. This element describes the type of roadway intersecting with the ramp at the ending terminal. | LRS Subblocks + LRS Intersection Approaches DATABASE ONLY | Guidance
|
| Begin Point Segment Descriptor (10)* | 10 | 10 | Roadway Segment | Location information defining the beginning of the segment. | Roadway Subblock, Roadway Block, LRS Roadway | SHAPE@XY |
| AADT Year (80) [for Each Intersecting Road] | 80 | 82 | Intersection | Roadway Subblock, Roadway Block, LRS AADT | AADT_YEAR | |
| Interchange Type (182) | 182 | 172 | Interchange/Ramp | NOT AVAILABLE | NOT AVAILABLE | |
| End Point Segment Descriptor (11)* | 11 | 11 | Roadway Segment | Location information defining the end of the segment. | Roadway Subblock, Roadway Block, LRS Roadway | SHAPE@XY |
| Unique Approach Identifier (139) | 139 | 129 | Intersection | Roadway Intersection Approaches | ApproachID | |
| Ramp AADT (191) | 191 | 181 | Interchange/Ramp | Roadway Subblock, Roadway Block, LRS AADT | AADT | |
| Segment Length (13) | 13 | 13 | Roadway Segment | Roadway Subblock, Roadway Block, LRS Roadway | SHAPE.LEN (Meters) | |
| Year of Ramp AADT (192) | 192 | 182 | Interchange/Ramp | Roadway Subblock, Roadway Block, LRS AADT | AADT_YEAR | |
| Direction of Inventory (18) | 18 | 18 | Direction of inventory if divided roads are inventoried in each direction. | ROUTEID LIKE '%3' | The Route IDs of our dual carriageways either end in 1 or 3. '3' generally corresponds to the outbound centerline geometry direction for dual carriageways, but there are some exceptions. Route ID's that end in 3 are the designated inventory direction for DDOT's HPMS program. | |
| Functional Class (19) | 19 | 19 | Roadway Segment | DCFUNCTIONALCLASS | ||
| Functional Class (19) | 19 | 19 | Interchange/Ramp | DCFUNCTIONALCLASS | ||
| Type of Governmental Ownership (4) | 4 | 4 | Roadway Segment | The entity that has legal ownership of a roadway. | Roadway Subblock, Roadway Block | OWNERSHIP |
| Median Type (54) | 54 | 55 | Roadway Segment | LRS Median Type | MEDIAN_TYPE | |
| Access Control (22) | 22 | 23 | Roadway Segment | LRS Access Control | ACCESS_CONTROL | |
| One/Two-Way Operations (91) | 91 | 93 | Roadway Segment | Roadway Subblock, Roadway Block | SummaryDirection (see docs for detailed guidance) | |
| Number of Through Lanes (31) | 31 | 32 | Roadway Segment | Roadway Subblock, Roadway Block | TotalTravelLanes (see docs for detailed guidance) | |
| AADT (79) | 79 | 81 | Roadway Segment | Roadway Subblock, Roadway Block, LRS AADT | AADT | |
| AADT Year (80) | 80 | 82 | Roadway Segment | Roadway Subblock, Roadway Block, LRS AADT | AADT_YEAR |