Air Force One carrying President Obama has arrived at Moffett Field in Mountain View and his motorcade should be underway shortly.
The president's agenda includes fundraisers in Los Altos Hills and at the Fairmont Hotel in San Jose Thursday evening.
Friday morning he'll visit the Walmart in Mountain View, where he'll deliver remarks about energy efficiency.
Drivers should anticipate traffic delays because of rolling closures and tight security in the area.
Before making his way north, fighter jets intercepted two aircraft that wandered into a restricted zone during President Obama's Los Angeles visit. A spokesman for North American Aerospace Defense Command says a small private plane and a private helicopter were spotted in the no-fly zone Thursday evening.
California Air National Guard F-15s escorted the aircraft out of the restricted area.