Reason why time table and ticket considered as an offer?

A timetable and ticket are considered as an offer because they represent a proposal for a contract between the transportation provider and the passenger. By providing a timetable and ticket, the transportation provider is offering a specific service at a specific time and price, which the passenger can accept by purchasing the ticket and using the service. This offer can be accepted by the passenger through payment and use of the ticket, creating a legally binding contract between the two parties.