On an expressway with three lanes in the same direction, which lanes are large passenger buses generally permitted to use, and what are the corresponding lane minimum speed rules?

1. Large passenger buses must cruise exclusively in the leftmost lane at 120 km/h to maintain transit schedule
2. Large passenger buses may drive in any lane at any speed between 40 km/h and 120 km/h
3. Large passenger buses must only use the emergency hard shoulder
4. Large passenger buses must drive in the middle or rightmost lanes (minimum speeds 90 km/h and 60 km/h respectively); they are prohibited from cruising in the leftmost passing lane (110–120 km/h)