Client was severely injured (traumatic brain injury, fractured skull bone and ankle with ongoing cognitve and physical symptoms, probably permanent) as a pedestrian when crossing Rt 28 in Chatham, MA. He was struck by a 2023 Tesla Model Y in reduced roadway visibility conditions due to sun/shade conditions. The auto braking system failed to activate in time to avoid the collision. This appears to be directly related to NHTSA investigation PE24031.