In railway terms, the equiment MJ80 or MJ 81. What does MJ represents?

Question

In railway terms, the equiment MJ80 or MJ 81. What does MJ represents?

Answer 1

Sounds to me like the Signal Indentification Plate.

The MJ stands for the area in which the signal is controlled. 80 is the number of the signal.

Answer 2

You don't say which country you are in but in England, any equipment with a one or two letter prefix represents the place that controls the equipment.  Ie: I work the signals at a place called Wakefield Kirkgate, all my equipment has a two letter prefix of WK followed by numbers. Hope this helps.

Answer 3

Sounds more like the designation for an air brake schedule, but I'm not sure.  I'll be lookin'.....

Answer 4

??

Ya got me there, cant find anything on it. Still looking though.

sorry.