Summer construction plans are already under way for Truckee and the Tahoe Basin, and the orange signs already are dotting regional highways and delaying commuting motorists.Below is a list of major construction projects from the California and Nevada departments of transportation to help drivers plan their routes this summer by allowing extra time for commutes or by planning alternate routes.Interstate 80Project: Construct shoulder barrier along the eastbound direction.Locations on roadway: Between Farad, Calif., and Nevada state line.Estimated project start date: Currently underway.Estimated project end date: Mid- to late-July.Time of construction: Day and night shifts, Monday through Thursday.Traffic impacts: Closure of …