NTSB should look into this in the event that the person was under autopilot at the time, or if there was some flaw in the design of the model X that should have helped or mitigated the death of the driver. I would love to see better guidelines for tesla and for emt/fire staff as the road was shut down for about 6 hours while they tried to deal with the battery. Someone from tesla eventually came down and helped the fire dept deal with the fire...
So, sure, this is a tricky and maybe even dangerous fork, and caltrans will probably put in those dividers like the ones on southbound old middlefield road, but its okay and smart to look into the driver, the model x and the subsequent 6 hours of delay and blockage to improve safety across the board.