The Santa Clara Valley Transportation Authority has filed a legal complaint over the ongoing VTA workers' strike as the labor action entered its second day in the South Bay.

VTA’s final contract offer to workers last week included a wage increase of 9% over three years, keeping the employees as the second-highest paid in the Bay Area and the fifth-highest paid in the country. The union is seeking a 6% raise per year over three years and wants to add a clause guaranteeing arbitration for contract disputes.

More than 1,500 transit workers walked off the job early Monday morning, marking the first work stoppage in VTA’s 30-year history.