By Rob Lenihan Even when, or if, autonomous trucks win over a concerned public, an important issue remains to bo solved. Everything was going along just fine–and then it wasn’t. On April 6, a tractor trailer fitted with autonomous driving technology by TuSimple Holdings (TSP) – Get TuSimple Holdings Inc. Report suddenly veers left, cuts across the I-10 highway in Tucson, Ariz., and slams into a concrete barricade. “Whoa! Whoa!” the passenger seat occupant shouts, while the driver grabs the wheel. Video of the accident, which is being investigated by federal safety regulators, caused a stir wh…