Across
- 3. last station at the west of PTW2
- 5. permission to clear a route from another box
- 7. number of trains per hour on the valley lines 2024
- 8. number of filaments in an SL35 lamp
- 10. signals face both ways
- 13. used to cross a valley
- 15. level crossing at the end of a platform
- 16. body used for competency management
- 17. mechanical signal
- 18. the rules of signalling design
- 20. old fashioned version of a button
- 21. control for checking a call on is viable
Down
- 1. when the full overlap is not available
- 2. the part you protect from a side on collision
- 4. timing circuit used where different systems meet
- 6. first station of the cornwall project
- 9. what yellow is for cars
- 11. the centre of the safety system
- 12. an item exchanged with a signaller
- 14. a bent post
- 19. colour used in ATP signalling