This is a bandaid on the much deeper problem. Inadequate highway infrastructure. Fix the root cause, not the symptom.
Obviously, you've never been to Fremont.
Fremont, CA, is located along scenic (HAR!) Interstate Highway 880, the major commute corridor for drivers in the East Bay going to work from the (somewhat) affordable residential communites of San Leandro and points north to jobs in Silicon Valley. It's three to five lanes wide, and it's PACKED at commute time. Widening it would require using eminent domain to acquire land in one of the most expensive areas in the United States - land that is already in use for (mostly) commercial and industrial concerns. You know: mom and pop businesses like, for instance, Tesla Motors. Then there's the permitting process, where, in addition to Federally mandated enviornmental impact studies, there are onces specific to California, public busybody organizations like the Sierra Club (which routinely files lawsuits against freeway expansion in the San Francisco Bay Area), and other meddlers. At long last, once all that is accomplished - at a cost of years and many billions of dollars - the actual construction can begin. At a cost of more billions of dollars from highway funds that are already wildly overstretched.
And the minute the new lanes open, they will already be occupied to maximum capacity, because Silicon Valley. (See the Cypress Overstructure replacement project in Oakland as an example.)
"For every complex human problem there is one and only one simple, easy to understand solution. And it is always wrong." - H. L. Menchken