Lektion eins: how do I use my horn

I honk when:

1. I want to greet someone

2. I need to warn someone

3. I am overtaking from the left

4. I am overtaking from the right

5. I am overtaken unfairly

6. I am overtaken fairly

7. I own a minibus and approach a 'bus stop'

8. I depart from the same 'bus stop'

9. There is no bus stop nearby, but potential customers could notice me

10. The traffic light is green and no one is moving (purely hypothetical)

11. The traffic light turns green and after 2 seconds no one is moving

12. The traffic light is green and everyone starts immediately

13. Someone cuts me off

14. I cut someone off

15. I haven't had a chance to honk for 30 seconds

16. I can.