PenceKate wrote:
.... In our recent drive along I-84 through Boise (which highway is fine, it's just the other drivers), we came upon a transport with a VERY wide load, my driver carefully passed it. Shortly after, he commented to me that he couldn't believe his eyes because in his rear view mirror, the driver of that very same VERY WIDE load had pulled out and was passing a long transport truck and there appeared to be only inches between them,....
Most likely both trucks were passing through, not local. Such a passing situation could have happened on any urban stretch of freeway.
Several years ago there was a bridge collapse north of Seattle.
https://en.wikipedia.org/wiki/I-5_Skagit_River_Bridge_collapse#IncidentThe collapse was caused by a southbound semi-trailer truck from Canada hauling an oversize load to Vancouver, Washington, ....all trucks with oversize loads are expected to travel in the inside lane where the clearance is around 17 feet. The oversize truck instead entered the bridge in the outer lane, while a second semi-truck and a BMW were passing it in the inner lane.
Note it was an out of state (country!) truck that hit the bridge.