BART OFFICIALS DON’T KNOW IF IT WAS CAUSED BY AN OPERATOR FAILURE OR SOME KIND OF MECHANICAL ISSUE. WELL, JUST LIKE THIS, IT COULD SHOW UP ON SIGNS. IT COULD GENERATE MONEY, BUT WHERE WILL IT GO AND HOW WILL IT BE USED. SHARON IS GETTING ANSWERS. Reporter: FROM TRAFFIC WARNINGS TO AMBER ALERTS, WE DRIVE BY THESE CHANGEABLE MESSAGE SIGNS JUST ABOUT EVERY DAY. WHEN IT’S NOT BEING USED FOR THOSE TYPES — TYPES OF SERVICES, ADVERTISEMENTS CAN BE UP THERE. Reporter: A STATE SENATOR IS PUSHING TO BRING MONEY THROUGH A PUBLIC PRIVATE PARTNERSHIP THAT HE SAYS WOULD NOT COST TAXPAYERS A DIME. I’M LOOKING FOURNIER POT OF MONEY THAT’S NOT RAISING TAXES ON PEOPLE MORE AND TO HELP FIX OUR ROADS. Reporter: SB1397 WOULD ALLOW ADVERTISING COMPANIES TO BID FOR SPOTS, BUT CALTRANS WOULD HAVE CONTROL OF THE CONTENT. THEY’RE — THERE ARE ABOUT 700 OF THOSE THROUGHOUT THE STATE AND THEY LOOK SIMPLE NOW, BUT IMAGINE WITH ADVERTISING DOLLARS PUMPED INTO THEM, THIS SIGN COULD GET A STATE OF THE ART MAJOR UPGRADE. WHERE WILL THIS MONEY GO? RIGHT BACK INTO OUR ROADS. IT’S SET TO GENERATE $200 MILLION A YEAR FOR THE STATE. ANY A INVESTMENT HELPS. THE DOLLARS WE EXPECT WOULD GO BACK INTO THE REPAIR UP AND GRADE OF THE STATE HIGHWAY SYSTEM. Reporter: HIGH DEFINITION UP GLADES COULD LOOK LIKE THIS OR THIS AMBER ALERT WHERE YOU CAN SEE A PICTURE OF THE LITTLE GIRL MISSING VERSES WORDS ON A SCREEN. THE MAJOR CONCERN IS COULD THEY BE ADDING TO DISTRACTED DRIVING? I DON’T THINK THAT’S IT’S A GOOD IDEA. YOU’RE GOING TO BE LOOKING AT WHAT THE SIGN SAYS OR THE BILLBOARD VERSUS THE TRAFFIC. Reporter: OTHERS SAY IT WILL TAKE AWAY FROM THE IMPORTANT MESSAGES THEY WERE MEANT FOR. IF A SIGN ADVERTISES ON WHAT I WOULD SEE AS AN AMBER ALERT SCREEN, I WOULD PROBABLY NOT TAKE IT AS SERIOUSLY. THE BILL HAS A NUMBER OF HURDLES TO PASS BEFORE IT GOES TO THE GOVERNOR’S DESK. HAS FOR DISTRACTING DRIVING CONCERNS, A PILOT PROGRAM WOULD