Kyren Lacy was driving at a very high speed exceeding the posted speed limit of 40 mph on Louisiana Highway 20. Reports say he was recklessly passing multiple vehicles, including an 18-wheeler, in a no-passing zone at an "extremely high rate of speed." This high speed led to emergency maneuvers by other drivers and eventually triggered a fatal crash. Specific numerical speed estimates were not detailed in the sources, but the description emphasizes reckless and significantly excessive speed on a congested and designated no- passing stretch of road.