Unionized truckers have rejected a tentative agreement with Port Metro Vancouver.
A spokesman for Unifor, which represents about 400 truckers, says its members could be headed to the picket lines as early as Monday.
The drivers had threatened earlier this week to go on strike and cripple operations at four container facilities around Metro Vancouver.
Talks with a mediator led to a tentative agreement, but members turned it down in a vote today.
The union says the sticking points are better pay, standardized rates to prevent drivers from undercutting one another and long delays at Port Metro Vancouver.
The United Truckers Association, which represents about 1,000 non-unionized truckers serving Port Metro Vancouver, went on strike last month for similar reasons.