Cars vs. planes, trains and buses Cars and private RVs are still recommended for the unvaccinated. But if you are fully vaccinated, itâs fine to take public transit, such as buses, trains and airplanes. Donât count on adjacent seats being open; those days are over. If possible, sit by a window and put on the ventilation. Wear a mask â not just to be polite, but because youâre surrounded by people from all over, who may not have had access to vaccines. If youâre traveling during meal times, consider waiting to eat until everyone else finishes and puts their masks back on. Avoid waiting in long lines while boarding or going to the restroom.