Western Star brought several different trucks to Mid America this year, including its soon-to-be-famous "Optimus Prime" big rig that's "loosely" based on an all-new 2015 model 5700 highway tractor design.
Sean Kilcarr is a former longtime FleetOwner senior editor who wrote for the publication from 2000 to 2018. He served as editor-in-chief from 2017 to 2018.