interlocking points and signal

setting points and crossings

setting marshalling yard signals

track maintenance

1 and 2 are correct

2 and 3 are correct

3 and 4 are correct

1 and 4 are correct

28.49 m

21.04 m

14.24 m

7.45 m

1,3,2,4

1,3,4,2

3,1,4,2

3,1,2,4

26.41

19.81

13.21

6.61