COLUMBUS, Ohio (AP) -- The union representing drivers and mechanics for the Columbus bus system have filed a 10-day notice of an intent to go on strike.

The filing follows months of negotiations that led to agreements on almost all contract provisions, with disagreements continuing over pension contributions and different wage scales for new employees.

Regular bus service would stop in Columbus if the strike takes place but services for people with disabilities and those with chronic medical conditions would continue.

Transport Workers Union Local 208 filed the notice Thursday about the potential strike, which would begin July 2.

Both sides have already tentatively agreed on three wage increases over three years, the opportunity to reduce health insurance premiums and introduction of a four-day work week for drivers.