I also find it intriguing that all of the Professional Engineers in Oregon, including ones involved in setting up the timing on the aforementioned yellow lights

I also find it intriguing that all of the Professional Engineers in Oregon, including ones involved in setting up the timing on the aforementioned yellow lights, failed (or chose not to) solve a basic kinematics problem like Mats did. Why did it take someone who was not a PE to fix this issue?