AtB AS ("AtB" or "Contracting Authority") is a mobility company that is responsible for planning, coordination, marketing and the procurement of scheduled public transport throughout Trøndelag County. AtB ́s most important task is to facilitate flexible, seamless journeys adapted to different needs and travel patterns. AtB is responsible for planning, acquiring, operating, developing and marketing the public mobility offer, which consists of scheduled buses, school transport, various forms of booked transport, express boat and ferry services. In addition, AtB combines and makes available all forms of mobility in its app for travel planning, which also includes micromobility and co-driving, which turns into a general offer for customers. In 2025, there were 58 million ongoing passengers in AtB's total offer. For further information, see the www.atb.no.