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FHWA Home / Safety / Tools and Technology

Model Inventory of Roadway Elements – MIRE, Version 1.0

Appendix C. Supplementary SafetyAnalyst Matrix

The following matrix provides information linking MIRE variables to Required, Required Conditionally, and Optional variables in SafetyAnalyst. The Comments are particularly relevant to the Required Conditionally variables.

MIRE Element SafetyAnalyst  Category SafetyAnalyst Variable SafetyAnalyst Description Required Comment
1. County Name Geographic Description county County Required conditionally Required when location system is Route/County/Milepost
3. Highway District Geographic Description district District Optional When available, can be used in site list query
6. City/Local Jurisdiction Name Geographic Description city City/Town Optional When available, can be used in site list query
7. City/Local Jurisdiction Name Geographic Description jurisdiction Jurisdiction Optional When available, can be used in site list query
8. Route Number Roadway Segment routeDisplayName Route Number Display Value Optional Used for display/ information only
8. Route Number Geographic Description routeName Route Name Required Required during data import
8. Route Number Intersection routeDisplayName Route Number Display Value Optional Used for display/ information only
9. Route/Street Name Geographic Description majorRoadName Major Road Name Optional Used for display/ information only
9. Route/Street Name Intersection minorRoadName Minor Road Name Required conditionally Required unless user assigns Segment ID to each crash
10. Begin Point Segment Descriptor Roadway Segment location Start Location Required Required during data import
11. End Point Segment Descriptor Roadway Segment end End Location Required Required during data import
12. Segment Identifier Roadway Segment agencyID Segment ID Required Required during data import
12. Segment Identifier Intersection Leg segmentID Segment ID Required Required during data import
13. Segment Length Roadway Segment segmentLength Segment Length Required Required for post-processing (Site list query)
14. Route Signing Geographic Description routeType Route Type Required Required during data import
17. Coinciding Route — Minor Route Information Alternate Route Name routeName Route Name Required Required during data import
18. Direction of Inventory Roadway Segment travelDirection Direction of Travel Required conditionally Required unless user assigns Segment ID to each crash
19. Functional Class Roadway Segment roadwayClass1 Roadway Class Level 1 Required Required for post-processing site subtype assignment
20. Rural/Urban Designation Geographic Description areaType Area Type Required Required for post-processing site subtype assignment
22. Access Control Roadway Segment accessControl Access Control Required Required for post-processing site subtype assignment
31. Number of Through Lanes Directional Attributes numThruLane Number of Through Lanes Required Required for post-processing site subtype assignment
32. Outside Through Lane Width
33. Inside Through Lane Width
Directional Attributes avgLaneWidth Average Lane Width Optional When available, will be used by some AMFs in Module 3
35. Auxiliary Lane Presence/Type Auxiliary Lane auxLaneType Auxiliary Lane Type Required The number of auxiliary is used in Module 3
40. Presence/Type of Bicycle Facility Directional Attributes bikeway Bikeway Optional When available, will be used by some AMFs in Module 3
43. Right Shoulder Type
47. Left Shoulder Type
Directional Attributes shoulderTypeOut Shoulder Type — Outside Optional When available, will be used by some AMFs in Module 3
44. Right Shoulder Total Width
48. Left Shoulder Total Width
Directional Attributes avgShoulderWidthOut Average Shoulder Width — Outside Optional When available, will be used by some AMFs in Module 3
54. Median Type Roadway Segment medianType1 Median Type Level 1 Required Required for post-processing site subtype assignment
55.  Median Width Roadway Segment medianWidth Median Width Optional When available, considered in homogeneous segment aggregation
57. Median (Inner) Paved Shoulder Width Directional Attributes avgShoulderWidthIn Average Shoulder Width — Inside Optional When available, will be used by some AMFs in Module 3
57. Median (Inner) Paved Shoulder Width Directional Attributes shoulderTypeIn Shoulder Type — Inside Optional When available, will be used by some AMFs in Module 3
68. Major Commercial Driveway Count
69. Minor Commercial Driveway Count
70. Major Residential Driveway Count
71. Minor Residential Driveway Count
72. Major Industrial/Institutional Driveway Count
73. Minor Industrial/Institutional Driveway Count
74. Other Driveway Count
Roadway Segment drivewayDensity Driveway Density Optional When available, considered in homogeneous segment aggregation
75. Terrain Type Roadway Segment terrain Terrain Optional When available, considered in homogeneous segment aggregation
79. Annual Average Daily Traffic (AADT) Annual Traffic aadtVPD AADT Required Required during data import
79. Annual Average Daily Traffic (AADT) Major Road Annual Traffic aadtVPD AADT Required Required during data import
79. Annual Average Daily Traffic (AADT) Minor Road Annual Traffic aadtVPD AADT Required Required during data import
80. AADT Year Annual Traffic calendarYear Year Required Required during data import
80. AADT Year Major Road Annual Traffic calendarYear Year Required Required during data import
80. AADT Year Minor Road Annual Traffic calendarYear Year Required Required during data import
81. AADT Annual Escalation Percentage Roadway Segment growthFactor Growth Factor Optional If available, used in post processing to estimate missing traffic volume
81. AADT Annual Escalation Percentage Intersection growthFactor Growth Factor Optional If available, used in post processing to estimate missing traffic volume
84. Percentage Trucks or Truck AADT Annual Traffic percentHeavyVehicles Heavy Vehicles Optional  
88. Hourly Traffic Volumes (or Peak and Off-Peak AADT) Annual Traffic peakHourlyVolume Peak or Design Volume Optional  
91. One/Two-Way Operations Roadway Segment operationWay Two-Way vs. One-Way Operation Required Required for post-processing site subtype assignment
92. Speed Limit Roadway Segment postedSpeed Speed Limit Optional  
92. Speed Limit Intersection Leg postedSpeed Speed Limit Optional  
120. Unique Junction Identifier Intersection agencyID Intersection ID Required Required during data import
121. Type of Intersection/Junction MIRE "Type of Junction/Intersection" is required to identify roadway to roadway intersections for SafetyAnalyst Required  
122. Location Identifier for Road 1 Crossing Point Intersection location Location Required Required during data import
122. Location Identifier for Road 1 Crossing Point Intersection Leg location Leg Location Optional If available, used in post processing for accident site assignment
123. Location Identifier for Road 2 Crossing Point
124. Location Identifier for Additional Road Crossing Points
Intersection minorLocation Minor Road Location Required conditionally Required unless user assigns Segment ID to each crash
126. Intersection/Junction Geometry Intersection intersectionType1 Intersection Type Level 1 Required Required for post-processing site subtype assignment
130. Intersection/Junction Offset Distance Intersection offsetDistance Offset Distance Optional  
130. Intersection/Junction Offset Distance Intersection offsetIntersection Offset Intersection Optional  
131. Intersection/Junction Traffic Control
132. Signalization Presence/Type
155. Approach Left Turn Protection
Intersection trafficControl1 Traffic Control Type at Intersection Level 1 Required Required for post-processing site subtype assignment
131. Intersection/Junction Traffic Control Intersection trafficControl2 Traffic Control Type at Intersection Level 2 Optional  
131. Intersection/Junction Traffic Control Intersection trafficControl3 Traffic Control Type at Intersection Level 3 Optional  
139. Unique Approach Identifier Intersection Leg legID Leg ID Required Required during data import
140.  Approach AADT Leg Annual Traffic aadtVPD AADT Required conditionally Required only if minor/major road AADT is missing
141. Approach AADT Year Leg Annual Traffic calendarYear Year Required conditionally Required only if minor/major road AADT is missing
143.  Approach Directional Flow Intersection Leg operationWay Operation Optional  
144. Number of Approach Through Lanes Intersection Leg legNumThruLane Thru Lanes Optional When available, will be used in collision diagram viewer
146. Number of Exclusive Left Turn Lanes Intersection Leg legNumLeftTurnLane Lt-Turn Lanes Optional  
150. Number of Exclusive Right Turn Lanes Intersection Leg legNumRightTurnLane Rt-Turn Lanes Optional  
153. Median Type at Intersection Intersection Leg legMedianType Median Type Optional  
155. Approach Left Turn Protection Intersection Leg leftTurnPhasing Left-Turn Phasing Optional  
161. Left/Right Turn Prohibitions Intersection Leg turnProhibitions Turn Prohibitions Optional  
163. Left Turn Counts/Percent Leg Vehicle Movements leftTurnVolume Lt-Turn Volume Optional  
164. Year of Left Turn Counts/Percent
166. Year of Right Turn Counts/Percent
Leg Vehicle Movements calendarYear Year Required Required during data import
165. Right Turn Counts/Percent Leg Vehicle Movements rightTurnVolume Rt-Turn Volume Optional  
182. Interchange Type Ramp rampConfiguration Ramp Configuration Required Required for post-processing site subtype assignment
186. Unique Ramp Identifier Ramp agencyID Ramp ID Required Required during data import
187. Ramp Length Ramp rampLength Ramp Length Required Required for post-processing if ramp end location is not specified
190. Ramp Number of Lanes Ramp numOfLanes Ramp Number of Lanes Optional  
191. Ramp AADT Ramp Annual Traffic aadtVPD AADT Required Required during data import
192. Year of Ramp AADT Ramp Annual Traffic calendarYear Year Required Required during data import
195. Roadway Type at Beginning Ramp Terminal
196. Roadway Feature at Beginning Ramp Terminal
199. Roadway Type at Ending Ramp Terminal
200. Roadway Feature at Ending Ramp Terminal
Ramp rampType Ramp Type Required Required for post-processing site subtype assignment
196. Roadway Feature at Beginning Ramp Terminal Ramp rampFreewayConnection Type of Connection (At Freeway) Optional  
197. Location Identifier for Roadway at Beginning Ramp Terminal Ramp location Start Location Required Required during data import
200. Roadway Feature at Ending Ramp Terminal Ramp rampCrossroadConnection Type of Connection (At Crossroad) Optional  
201. Location Identifier for Roadway at Ending Ramp Terminal Ramp endLocation End Location Required conditionally Required for post-processing if ramp length is not specified
201. Location Identifier for Roadway at Ending Ramp Terminal Ramp rampToID To Segment Optional  

The following SafetyAnalyst variables are either defined by (and thus known to) the user agency or can be calculated using MIRE variables.

SafetyAnalyst Category SafetyAnalyst Variable SafetyAnalyst Description Required Known/ Calculated Comment
Roadway Segment increasingMilesposts Direction of Increasing Mileposts or Distances Optional Known When available, will be used in collision diagram viewer
Roadway Segment discontinuity Discontinuity Required conditionally Calculated Required for use with sliding window and in forming longer homogeneous sections
Roadway Segment interchangeInfluence Interchange Influence Area on Mainline Freeway Required Calculated Required for post-processing site subtype assignment
Directional Attributes direction Direction Required Calculated Required during data import
Intersection majorRoadDirection Major Road Direction Required conditionally Calculated Required unless user assigns Segment ID to each crash
Intersection majBeginInfluenceZone Begin Influence Zone — Major Road Required conditionally Calculated Required unless user assigns Segment ID to each crash
Intersection majEndInfluenceZone End Influence Zone — Major Road Required conditionally Calculated Required unless user assigns Segment ID to each crash
Intersection minBeginInfluenceZone Begin Influence Zone — Minor Road Required conditionally Calculated Required unless user assigns Segment ID to each crash
Intersection minEndInfluenceZone End Influence Zone — Minor Road Required conditionally Calculated Required unless user assigns Segment ID to each crash
Intersection Leg influenceZone Influence Zone Optional Calculated If available, used in post processing for accident site assignment
Leg Vehicle Movements throughVolume Thru Volume Optional Calculated

The following SafetyAnalyst variables are not in MIRE Version 1.0. They may be added in later versions.

SafetyAnalyst Category SafetyAnalyst Variable SafetyAnalyst Description Required Comment
Roadway Segment gisID GIS Identifier Optional When available, used by GIS interface
Roadway Segment growthSource Growth Factor Source Optional If available, used in post processing to estimate missing traffic volume
Roadway Segment openedToTraffic Date Opened to Traffic Required conditionally Required for sections opened after first accident/ADT year
Geographic Description corridor Corridor Optional If available, used in Module 1 corridor screening
Intersection openedToTraffic Date Opened to Traffic Required conditionally Required for sections opened after first accident/ADT year
Intersection agencySiteSubtype Agency Site Subtype Optional When available, can be used in site list query
Intersection gisID GIS Identifier Optional When available, used by GIS interface
Intersection growthSource Growth Factor Source Optional If available, used in post processing to estimate missing traffic volume
Intersection Leg legDirection Direction Required conditionally Only required for collision diagram (Collision Diagram Viewer)
Intersection Leg legType Type Required Required for post-processing to validate intersection type
Ramp agencySiteSubtype Agency Site Subtype Optional
Ramp gisID GIS Identifier Optional When available, used by GIS interface
Ramp growthFactor Growth Factor Optional If available, used in post processing to estimate missing traffic volume
Ramp growthSource Growth Factor Source Optional If available, used in post processing to estimate missing traffic volume
Ramp openedToTraffic Date Opened to Traffic Required conditionally Required for ramps opened after first accident/ADT year
Ramp routeDisplayName Route Number Display Value Optional Used for display/information only

Page last modified on October 15, 2014.
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