A word to those who are not regular SJC drivers:
The traffic in the downtown area is often very slow, summer and weekends are worse.
With the 5/74 interchange project underway, traffic this summer could be really bad, weekends awful.
Take the Camino Capistrano Exit (1st exit South of Ortega Highway 74) to access SJC SC from either direction.
You will likely still sit at a couple of lights, but it'll be better than exiting at Ortega Hwy into the downtown gridlock.
happy road-tripping.