You can get fresh air, save money, and have a bit of fun by renting a bike and dropping it near a Lab shuttle stop. There are 129 East Bay bike rental locations; 81 in Oakland, 37 in Berkeley, and 11 in Emeryville. Many of these are near a Lab shuttle stop. https://commute.lbl.gov/2022/05/13/rent-a-bike-ride-a-shuttle/