Same as before. You can't toke and drive. Don't leave the blunt in your car ashtray. Don't keep your stash in your glove box, in the center console or under the seat.
Basic common sense.
YOU CAN NOT DRIVE UNDER THE INFLUENCE JUST AS YOU CAN NOT DRINK AND DRIVE.
DO NOT HAVE IT IN THE CAR TO BE SAFE.
SB65 SAYS CANNABIS USE IN CARS IS NOW ILLEGAL FOR DRIVER AND PASSENGER