Trucks evolved in the past 20 years from the dirty machines to the ultimate transporting vehicles that the United States depend on. Trucks move more than 70% of the nation's freight by weight, and more than 80% of the nation's freight bill in 2019, according to ATA data, says FleetOwner. Truck engines usually last 1 million miles of usage, and the average mileage driven by Over the Road truck drivers goes from 80,000 to 110,000 miles annually. Some of them break closer to 125,000 a year. How about which truck is the best for truck drivers in 2021? That is not an easy question to answer, although it's popular amongst truck drivers. Every truck driver has their favorite. Here is our list of the best semi-truck manufacturers.