1. You have to take the bus number two.
2. You have to take the number two bus.
3. You have to take the Bus Number Two.
4. You have to take the Number Two Bus.
[Which one is grammatical?]
2. You have to take the number two bus.
3. You have to take the Bus Number Two.
4. You have to take the Number Two Bus.
[Which one is grammatical?]