Key:route availability
| route_availability |
| Description |
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| Used to show what freight weight can go on a track. |
| Group: Railways |
| Used on these elements |
| Useful combination |
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| Status: obsolete |
| Tools for this tag |
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This proposed tag has been abandoned. It has never been used
A scale of 1-10 determining what freight can go on a track in terms of weight. A train rated 8 can go on a track weighted 8 but cannot go on a track rated 7.
Route Availability (RA) is the system by which the permanent way and supporting works (bridges, embankments, etc.) of the National Rail network of Great Britain are graded. All routes are allocated an RA number between 1 and 10.
Rolling stock is also allocated an RA (again between 1 and 10) and the RA of a train is the highest RA of any of its elements. The train must have a route availability (RA) lower than or equal to the RA of a line to be allowed to use it. The RA is primarily related to the axle load of the vehicle, although axle spacing is also taken into consideration. In practice it is the locomotive which governs where trains may operate, although many high capacity 4 axle wagons have high RAs when fully loaded. (When considering the operation of trains the loading gauge must also be considered.)
More information can be found at .