Teamsters Union drivers and mechanics for Tucson's Sun Tran municipal bus system approved a one-year contract Thursday evening after a strike was averted earlier in the week.

The new contract will give raises to employees with more than six months experience with Sun Tran.

The contract was agreed to Wednesday, hours before the midnight deadline and a possible walkout that would have shut down most of the metropolitan area's 40 bus lines and left most of 60,000 daily riders stranded.

Union officials said they wanted to avoid a strike but also wanted to get more money for employees. Professional Transit Management, the company that runs Sun Tran for the city, had pulled back automatic raises for employees.

The union contract does not cover workers for Tucson's new streetcar system.