uk.railway FAQ |
1 Call attention
All codes must be preceeded by this except where marked *.
"Is Line Clear ?" codes - in Track Circuit Block areas these simply describe the approaching train.
Code |
Meaning |
| 1 | Call attention |
| 4 | Class 1 train |
| 3-1 | Class 2 train |
| 1-3-1 | Class 3 train |
| 3-2-5 | Class 4 (Freightliner) train |
| 3-1-1 | Class 4 (other) train |
| 2-2-1 | Class 5 train |
| 5 | Class 6 train |
| 4-1 | Class 7 train |
| 3-2 | Class 8 train |
| 1-2-2 | Class 9(a) train |
| 1-4 | Class 9(b) train |
| 2-3 | Class 0 locomotive(s) |
| 2-2-3 | Train required to stop in section |
| 2-1-2 | Token required to protect trolley |
| 2-6-1 | Train which can pass trains signalled 2-6-1 or 2-6-2 on the opposite or adjoining line but which will be signalled 2-6-2 or 2-6-3 at some portion of its journey. |
| 2-6-2 | Train which cannot be allowed to pass trains signalled 2-6-2 or 2-6-3 on the opposite or an adjoining line. |
| 2-6-3 | Train requiring the opposite or an adjoining line to be blocked. |
| 2-1-6 | Train which carries speed or route restrictions only and which can pass trains signalled 2-6-1 or 2-6-2 on the opposite or an adjoining line. |
| 1-2-6 | Line to be blocked for passage of train conveying out of gauge load on an opposite or adjoining line. |
| 3-3-3 | Unofficial bell code in wide use for request no "needle" (line clear) |
There are also general and specific suffixes for the above codes. For example:
Code |
Meaning |
| -2 | Electric train (on mixed route). |
| -1-3 | Train routed to branch at receiving box. |
Other codes:
Code |
Meaning |
| 5-3 | Train incorrectly described. |
| 3-5 | Cancel last description sent. |
| 3-5-5* | Restricted acceptance. |
| 3-3-5 | Line now clear to clearing point. |
| 2* | Train entering section |
| 1-2-1* | Train approaching (where authorised). |
| 2-1 | Train out of section, or Obstruction removed, |
| 2-4 | Blocking back inside home signal [double line]. |
| 3-3 | Blocking back outside home signal [double line]. |
| 3-3 | Blocking back [single lines]. |
| 3-3-4 | Train or vehicles at a stand. |
| 5-2 | Release taken. |
| 2-5 | Token replaced. |
| 2-2* | Locomotive assisting in rear of train. |
| 2-1-3 | Locomotive arrived. |
| 3-2-3 | Train drawn back clear of section. |
| 6* | Obstruction Danger, or emergency alarm operated. |
| 6-2 | Train an unusually long time in section. |
| 7 | Stop and examine train. |
| 9 | Train proceeding towards you passed without tail lamp. |
| 4-5 | Train arriving from you passed without tail lamp. |
| 5-5 | Train divided. |
| 2-5-5 | Train or vehicles running away in wrong direction or on single line. |
| 4-5-5 | Train or vehicles running away in right direction. |
| 3-3-2 | Shunting into forward section. |
| 8 | Shunt withdrawn. |
| 2-3-3 | Working in wrong direction |
| 5-2 | Train clear of section. |
| 2-5 | Train withdrawn. |
| 4-4-4-4 | Transference of tokens. |
| 8-2 | Distant signal defective. |
| 2-8 | Home signal defective. |
| 8-4 | AHB or AOCR level crossing local control being taken where communication not available. |
| 1-1* | Answer telephone. |
| 1-1-6* | Police assistance urgently required. |
| 5-5-5 | Opening signal box. |
| 5-5-7 | Closing signal box where section signal is locked by the block |
| 7-5-5 | Closing signal box otherwise. |
| 16 | Testing bells or block equipment. |