A strike has been averted at GO Transit as Metrolinx and the Amalgamated Transit Union Local 1587 reached a tentative four-year deal overnight Monday.

About 1,800 GO bus drivers, ticket sellers, maintenance and safety personnel, and some office staff were poised to go on strike at midnight, however, contract negotiations continued past that deadline.

The strike would have affected roughly 53,000 bus riders across the GTA but would not have impacted GO train service.

“We all go to work today,” said a relieved ATU Local 1587 president, Dan Harris. “The buses are going to roll and all the members that keep these buses rolling and all the other departments…the job continues.”

The current three-year contract between Metrolinx and the union expired on Saturday.

Regular bus service will resume later Monday morning, Metrolinx spokeswoman Anne Marie Aikins said.

Details of the contract have not been released and the agreement still has to be ratified by union members.

Go Transit hasn’t had a strike in its 47 years of operation.