Under Austrian passenger transport guidelines, what is the recommended cabin temperature setting for a touring coach during winter long-distance operations?

1. 14°C to 16°C to ensure passengers stay alert and awake
2. 20°C to 22°C with draft-free, balanced airflow across all passenger seating zones
3. 26°C to 28°C to rapidly dry wet winter coats and boots
4. 30°C in the front saloon and unheated in the rear underfloor area