An accident involving a tractor trailer carrying gravel and a pickup has blocked southbound Bradshaw at Vintage Park this morning. All southbound lanes are blocked. One northbound lane is open, but the traffic signal is out. Traffic is already backing up. The accident occurred around 6:23 am this morning. The trailer from the truck is wrapped around a power pole and there are power lines down. CHP is on scene and SMUD is on the way.