The Teamsters Union says employees have been negotiating a new contract with CCTA since May.
The union says CCTA gave its best offer just over a week ago.
On Sunday, 53 employees voted it down compared to 4 who approved it.
Employees aren't happy about three things: part-time workers taking hours away from full-time employees, workers on call for almost 15 hours a day, and higher wages offered to new employees.
The union says if there is a strike bus services would stop to Middlebury, Montpelier, and others.
CCTA says it's ready and willing to continue negotiating to reach a settlement.
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