Having sat through California freeway jams that didn’t even involve an accident, I’m kinds sympathetic with the officer who wanted the guy to move the darn truck.
Firefighters have always operated within a military style command structure. After 9/11 incident command was further codified. The cop should have at least been through the basic FEMA National Incident Management System classes (NIMS. Unless the cop was the incident commander, which he wasn’t, he was wrong.