The union representing locked-out workers at Acadian Coach Lines says the company's refusal to go to binding arbitration is disappointing. Glen Carr of the Amalgamated Transit Union says workers tried to get the buses rolling again in the Maritimes. But the company says it doesn't believe binding arbitration would work unless the union is willing to review driver assignments. The lockout affects bus services in New Brunswick and Prince Edward Island. The UNB Student Union, meanwhile, has joined its STU counterpart in offering a chartered bus to help students get home for the holidays. It'll leave next Wednesday with stops in Saint John, Moncton and Amherst.