Route availability
From Wikipedia, the free encyclopedia
Route Availability is a system by which railway lines in the United Kingdom are graded. The system works on the principle of axle loads (and occasionally other factors), and is designed to stop locomotives with too high an axle load travelling over track which may be damaged by them.
In this system, each class of locomotive is allocated a route availability between one and ten, based primarily on the weight per axle. Each route is similarly allocated an RA number between 1 and 10. The rule is that a locomotive may not work over a route that has a route availability (RA) group lower than its own RA group.
The information regarding route availability (RA) on this page comes from the British Rail (London Midland Region) Route Availability Guide, and the Freight Train Loads Book, both issued in 1969. It should be noted that several routes will have had their RA numbers changed since that time.
| Group Number | Mainline Classes | Shunters |
|---|---|---|
| 1 | 01, 03, 04 | |
| 2 | 02, 04, 05 | |
| 3 | ||
| 4 | 15, 17, 22 | |
| 5 | 20, 23, 25, 27, 29, 31, 37, 55 | 06, 08, 09, 10, 11, 12 |
| 6 | 24, 26, 33, 35, 40, 42, 43, 47, 48, 50, 52, 71, 73, 81, 82, 83, 84, 85, 86 | 07 |
| 7 | 44, 45, 46, 74 | |
| 8 | 76 | 13 |
| 9 | ||
| 10 |
