The report from Tesla says the autopilot didn't see the truck because the "white side of the tractor trailer" mathched "a brightly lit sky". It doesn't mention radar which should have had a huge signature. On twitter Musk addresses radar and says "radar tunes out what looks like an overhead road sign to avoid false braking events".<p>Isn't the obvious question why does it also tune out huge overhead road signs which are moving from left to right across the road?
"Tesla Says" would be more accurate, since Tesla was the one to officially report it first via their blog and they also notified the US Highway department so they can do an independent investigation.