Yasin Ozturk/Anadolu Agency via Getty Images The NHTSA is investigating a collision between a Tesla sedan and a tractor trailer in Detroit. The passenger of the Tesla was hospitalized in critical condition, the Detroit police said. Police don't think that the driver was using Autopilot software – but haven't ruled it out. Tesla is working alongside police and transport authorities to investigate a collision between a Tesla sedan and a tractor trailer in Michigan that left at least one person in critical condition. The Detroit police told Reuters on Monday that the collision happened at 3:20 a.m. on March 11 in southwestern Detroit when a Tesla sedan drove through an intersection, struck a tractor trailer, and became wedged under it.