| 246 / | HD | RAILWAY SWITCHES AND SIGNALS |
| 20 | DF | BLOCK-SIGNAL SYSTEMS {4} |
| 27 | DF | .~ Automatic {5} |
| 28 R | DF | .~.~ Electric {18} |
| 87 | | .~.~.~ Line-current supply {4} |
| 88 | DF | .~.~.~.~> Intermediate signal |
| 89 | DF | .~.~.~.~> Short sectional rail closure |
| 90 | DF | .~.~.~.~> Car-actuated controller {1} |
| 92 | DF | .~.~.~.~> Intermittent contact |