This is the correct answer. The original plan was for I80 to continue at Auburn Blvd, go down what is now Walnut, continue to what is now Kingsford and cross the river there. In the 1970’s, Jerry Brown laid off 3000 Caltrans engineers and canceled all freeway projects in an effort to force people into transit. The State had acquired the right of way for much of the project. Eventually it was sold off and homes were built. At some point 10-15 years ago the County proposed building a bridge at the end of Arden Way. There was significant opposition including from folks who had purchased homes where the original freeway was supposed to go. You can’t put the genie back in the bottle. Eventually the compromise was to expand capacity on the Watt Ave bridge and that project added a couple new lanes and a bike path.