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National (ROI_3)
DGIF baseline 2026-1, the latest. Earlier baselines: timemap.
RDF: roi_3.ttl
- Name
national- Attribute
- ROI Route Designation Type
- Definition
- A designated set of highways which may have limited access or semi-controlled access and interconnect secondary routes with national motorways.
- Description
- May be identified in their designations, for example, with a 'US' in the US, or an 'N' for National in other countries. In many areas there is no preceding letter designation.
- Accepted
- 2013-10-18
- Defined by
- NAS 5.0
Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.