A Look At The Supply Chain Issues
I have little experience in the over the road part of the supply chain. I have though worked for a company (2013-2019) that shipped over a million pounds of metal products to local customers and got to talk to quite a few long haul drivers. Many of whom had stopped driving long haul because of the problems mentioned in this article.
I have a feeling that supply issues and stuff on the shelf, is going to only get worse over the foreseeable future, especially thru the holidays.
One thing, the small number of exit lanes at ports, I believe is due to Homeland Security. They scan/xray/detect for radiological sources (like terrorist bomb) containers as they leave the port. That equipment is very expensive, so there isn't that many at each port.