The movement pattern that works
Keep the city day compact before adding the hill road.
- Use Five Roads or Swarnapuri as the practical city anchor.
- Use Salem Junction logic when train timing controls the day.
- Start Yercaud early if it is the main route.
Salem transport is not about mastering a complex system. It is about avoiding a day that becomes a chain of small, hot, annoying moves.
I would group city stops first, then decide whether Yercaud deserves a separate morning. If the answer is yes, protect that route instead of squeezing it in late.