Your autobus is authorised for 40 seated and 20 standing passengers. Seats are full and 20 people are standing. Five more want to board. What should you do?

1. Refuse the extra five; you are already at constructed passenger capacity
2. Board them if the aisle still has a one-foot gap
3. Board them if the journey is inside a built-up area
4. Board them and drive slower so standing density becomes legal