Research shows that wearing your mask, and opening the front passenger window, and the window behind the driver seat helps to reduce the spread of the novel coronavirus in your vehicle. See this NY Times article.
I am looking to start a carpool group in Hayward or Castro Valley area to take turns driving each week. I work near Marsh and 101 in Menlo Park from 7am to 3:30pm. I am looking for 1 to 3 people who have a similar schedule and work in or near Menlo Park.