Widening the 120 Bypass from Main Street to Interstate 5 from four to six lanes could be completed by 2030.It is part of $1.1 billion in mainline highway improvement the San Joaquin Council of Governments is targeting for the South County to ease freeway congestion over the next 22 years. The projects are part of $11.5 billion in transportation initiatives planned through 2042 throughout San Joaquin County that are being leveraged with the half cent Measure K countywide sales tax. The sales tax — that allowed San Joaquin County to snag matching state bond funding to widen Highway 99 to six lanes from Manteca to the Crosstown Freeway in Stockton years ahead of schedule — will cover 39.1 percent of the $11.5 billion tab.Topping the list as the highest priority are upgrades to the Highway 99/120 Bypass/Austin Road interchanges.