UFCW MCGEO Local 1994, the union that represents some school bus drivers in Anne Arundel County, voted to authorize a strike Monday just as students returned to the classroom.
It is unclear when the strike will start, as union leaders said they are waiting for management company Student Transportation of America (STA) to "provide a counter or resolution."
Union leaders said the management company's latest contract proposal "fails to address core issues around fair pay and respect on the job."
The union represents a total of 8,000 workers in Maryland.
In a statement shared Monday, STA said it is communicating with union leaders, the Anne Arundel County Public School district and local drivers about the contract discussions.
"We remain hopeful this matter will be resolved quickly so we