Signal classification and light sequence

1、 Inbound signal (yellow green red yellow white)

2、 Outbound signal

Automatic block: (yellow green red yellow white)

Semi automatic block: (green red)

3、 Route annunciator (yellow green red yellow white)

It is divided into receiving route and departure route

4、 Through annunciator:

Three display (yellow, green and red)

Four display (green, red and yellow)

5、 Advance annunciator:

Automatic block (same as passing signal)

Semi automatic block (green and yellow)

6、 Hump signal (yellow, green, red and white)

7、 Shunting signal (blue and white)

8、 Repeater signal

Incoming repeater: (generally, there are three white lights, two white lights are on, and none are off)

Exit repeater: (green)

9、 Trip annunciator: (red)