1. Comparison of Proposed MMIRE Elements

2. Introduction Comparison of the current proposed MMIRE elements with: – 23 State databases HSIS States States databases obtained through other FHWA efforts – Other inventories/databases HPMS, MMUCC, SafetyAnalyst, IHSDM, and HSM – Excerpts from comparison spreadsheets (handouts)

3. Comparison with States MMIRE Total: 180 elements 54 elements not maintained by States Roadway Segment Descriptors: 99 elements – 22 elements not maintained by States Roadway Alignment Descriptors: 13 elements – 2 elements not maintained by States Roadway Junction Descriptors: 68 elements – 30 elements not maintained by States

4. Comparison with States: Roadway Segment Descriptors Includes location, lane, shoulder, median, and traffic descriptors States collect majority of location elements States are not collecting some median descriptor elements States collect majority of traffic flow data

5. Comparison with States: Roadway Alignment Descriptors Includes horizontal curve and vertical grade descriptors States are collecting majority of elements – Out of 8 horizontal alignment elements, States are not collecting 2 elements 101. Curve Feature Type 105. Horizontal Transition/Spiral Curve Presence – All 5 Vertical Grade elements are maintained by all of the States

6. Comparison with States: Roadway Junction Descriptors Includes at-grade intersection and interchange and ramp descriptors Many of the At-grade Intersection/ Junction elements are not collected – General Descriptors: States not collecting 9 out of 20 elements – At Grade Intersection/Junction Descriptors broken down by approach: States not collecting 17 out of 29 elements All 6 of the General Interchange Descriptors are maintained by all of the States

7. Comparison with Databases MMIRE Total: 180 elements 56 elements not contained in databases Roadway Segment Descriptors: 99 elements – 23 elements not contained in databases Roadway Alignment Descriptors: 13 elements – 1 element not contained in databases Roadway Junction Descriptors: 68 elements – 32 elements not contained in databases

8. Comparison with Databases: Roadway Segment Descriptors The majority of these elements are included in the other databases Databases contain majority of location elements Databases do not contain some median descriptor elements Databases contain majority of traffic flow data and traffic operations/control data

9. Comparison with Databases: Roadway Alignment Descriptors Databases include majority of elements – Out of 8 horizontal alignment elements, only 1 is not contained in any of the databases 101. Curve Feature Type – All 5 Vertical Grade elements are contained in the databases

10. Comparison with Databases: Roadway Junction Descriptors Databases contain majority of General Descriptors At Grade Intersection/Junction Descriptors broken down by approach: Databases do not contain 15 out of 29 elements General Interchange Descriptors: Databases do not contain any of the 6 elements

11. Questions