NHTSA investigated the May 2016 side underride crash of Joshua Brown’s Tesla. Here is the report which they published in January 2018.
Read this description of the injuries which the driver suffered as a result of Passenger Compartment Intrusion (PCI) from truck underride:
The front plane of the Tesla underrode the mid-aspect of the semi-trailer in the intersection, and the first crash event occurred as the base of the windshield and both A-pillars of the Tesla impacted and engaged the sill/frame of the semi-trailer’s right plane/undercarriage. Directions of force were in the 12 o’clock sector for the Tesla and the 3 o’clock sector for the UTI semitrailer. The Tesla maintained its momentum and completely underrode the semi-trailer, which sheared the entire greenhouse and roof structure from the Tesla.
During the underride impact, the driver’s face and head contacted multiple intruding components. These contacts produced fatal injuries to the driver. Intruding components and the semi-trailer also contacted and deformed both front row seatbacks and all of the Tesla’s structural pillars. The sheared roof and tailgate/hatch of the Tesla were captured by the right plane of the semi-trailer as the vehicle continued beneath it, and became deposited in the roadway at the location of the impact.
Please explain to me why NHTSA did not suggest that side guards might have changed the outcome of the crash and, furthermore, took no action to initiate rulemaking to mandate side underride protection.
NTSB also investigated the May 2016 Tesla crash and made no side guard recommendations.
Another Tesla Side Underride Tragedy Points to Need for Truck Side Guard Mandate