Teamsters loses 500,000 members in one decade, while dock to warehouse traffic explodes, and DOT adopts "Weigh in motion" system to replace traditional scales. Computerized, and easily manipulated.

Reconcile.

https://labornotes.org/blogs/2017/10/review-big-rig-trucking-and-decline-american-dream

https://www.kistler.com/en/applications/sensor-technology/weigh-in-motion/