STA was created as a local transportation authority and the original Measure A was approved by the voters.

STA was designated as the Congestion Management Agency (CMA) for Sacramento County.

The STA Governing Board accepted the designation as the Sacramento Abandoned Vehicle Service Authority (SAVSA) and imposed an annual vehicle registration fee to implement the program.

STA, California Highway Patrol (CHP), and California department of Transportation (Caltrans) initiated Freeway Service Patrol (FSP) in Sacramento County for the first time.

STA, CHP, Caltrans, and Yolo County Transportation District (YCTD) extend Freeway Service Patrol into Yolo County.

STA governing board voted to extend the SAVSA program for 10 years.

The extension of Measure A was approved by voters with more than 75%. The new Measure A began in 2009 and will end in 2039.

STA governing board voted to extend the SAVSA program for 10 years.

STA placed Measure B, a new ½ cent transportation sales tax measure, on the ballot. Measure B received nearly 66% approval by voters but not the required two-thirds approval needed.

Senate Bill 1 (SB 1), officially known as the Road Repair and Accountability Act of 2017, was signed into law by Governor Jerry Brown. STA approved the use of SB 1 Local Partnership Formulaic Program for projects in Sacramento County for the first time.

STA placed Measure C, a 10-year extension of SAVSA, on the ballot. Measure C received nearly 58% approval by voters but not the required two-thirds approval needed.