| Name | Data Type | Order | Definition | ||
|---|---|---|---|---|---|
| aboveGrade | EnumerationLiteral | 0 | Above or over the normal road grade elevation. | ||
| atGrade | EnumerationLiteral | 1 | At the normal road grade elevation. | ||
| belowGrade | EnumerationLiteral | 2 | Below or under the normal road grade elevation. | 
| Multiplicity | From | Role | Role description | Association | Multiplicity | To | Role | Role description | 
|---|