| Name | Data Type | Order | Definition | ||
|---|---|---|---|---|---|
| both | EnumerationLiteral | 0 | Indicates that both directions of traffic flow are affected by the situation or relate to the traffic data. | ||
| negative | EnumerationLiteral | 1 | The direction of traffic flow concerned by a situation or traffic data. In ALERT-C the negative direction corresponds to the negative offset direction within the RDS location table. | ||
| positive | EnumerationLiteral | 2 | The direction of traffic flow concerned by a situation or traffic data. In ALERT-C the positive direction corresponds to the positive offset direction within the RDS location table. | ||
| unknown | EnumerationLiteral | 3 | Unknown direction. | 
| Multiplicity | From | Role | Role description | Association | Multiplicity | To | Role | Role description | 
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