. >> reporter: lori bergenstock with mothers against drunk driving supports more research. >> the moreo how cannabis impacts driving, the better educated and equipped we are to deal with it and law enforcement is to deal with it. >> so the study got the green light from the state and the feds. it will be overseen by scientists from the uc san diego center for medical cannabis research. >>> now it's time to go to paul heggen. you always have a good one. can you top that one? >> there's nothing i can say that won't get me in trouble. >> exactly. just safe driving on the roads, right? >> exactly. everybody just beware. let's look what's happening weatherwise and we'll both keep our jobs. looking out at san jose, clear skies, but we'll see low clouds and fog later tonight. it will be a cool weekend, temperatures about 5 to 10 degrees below average on a widespread basis. then we warm up monday, back to near average and then the warmth continues to build, suddenly above average temperatures tuesday. look at the roller coaster ride for concord, a good 10 degrees below average saturday and sun