User:Diacritic/Proposed Australian Routes
Each state and territory has its own system for allocating route numbers. Many states have moved to the newer, "alphanumeric" numbering system for route allocation. Other states are still in the process of transitioning to the new system, or haven't started transitioning at all, and continue to use the "old style" numeric routes. Both route types of route numbers should be documented with the ref=* and network=* tags
The network=* tag should be used to identify the state or territory in which a road is located, while the ref=* tag should contain the route number. For alphanumeric route numbers, the ref=* should include the route letter prefix.
|Alpha-numeric routes||Numeric Routes|
||Alt National Route
Route and Highway Relations
Many named routes and highways will be known by different names as they pass through towns and cities; most famously the Princes Highway. These major routes should also be given their own, separate, relation.
When a route crosses a state boundary, the route relation should be split into multiple single state routes and added to a "national" super-relation.