JUNEAU — The Alaska Marine Highway System will begin charging more for tickets on ferries in demand, the agency announced Thursday as it released its winter schedule. The new dynamic pricing system starts when a ferry hits 30% of its capacity on a given route. When that happens, ticket prices rise 5% for walk-aboard passengers and 10% for vehicles and cabins. That surcharge rises as the ferry becomes closer to capacity. When the ferry is 90% full, a passenger ticket costs 30% more, and someone booking a vehicle or a cabin will pay 50% more. The ferry system also announced new fees for changing bookings and a 10% surcharge for bookings near a special event. Robert Venables, chairman of the state’s Marine Transportation Advisory Board, said the board discussed the fare change in July. “I think the traveling public generally is aware that prices go up the closer you get to the date of your travel,” he said by phone, explaining that Alaska Airlines has “trained” Alaskans to expect that kind of an increase. He said the increase was larger than he had envisioned. “While MTAB did recommend going toward dynamic pricing, they never saw details of this proposal,” he said, adding that if ...