There are many people who spend more time on the roads daily than I do. Most of my trips are distance trips, here to there and sometimes beyond. I spend four, six and sometimes ten hours at the wheel at one time. It may be true my commute is about twenty feet, but often my drive is measured in hundreds of miles. That said, I still put between 50,000 and 75,000 miles on my car in each of the last 16 years. I maintain I know a little about driving the nation's highways.
Whatever politician or engineer or traffic expert decided to create a different speed limit for tractors/ trailers and passenger cars was a fucking moronic idiot who clearly has never spent one minute driving from Indy to Chicago. The long stretches of Interstate where one half of the vehicles are mandated at a slower speed than the other half is a recipe for disaster. If you have ever driven that stretch, you know exactly what I mean. The long stretches of I-65 South of Indy are often just as congested. The same is true of the other Indiana interstate roads as well.
I chalk it up to example 3,379 of governmental stupidity.