If you had ever bought a set of tags for a heavy truck you would know they are paying a lot for those tags.
$ 550 dollars a year - HVUT
https://truecostblog.com/2009/06/02/the-hidden-trucking-industry-subsidy/
Freight trucks cause 99% of wear-and-tear on US roads, but only pay for 35% of the maintenance. This $60B subsidy causes extra congestion and pollution, and taxpayers pay the bill.
It seems obvious that the heavier the vehicle, the more damage it does to roads over time. A 40,000 pound big rig probably does a bit more damage than your average 3500 pound consumer vehicle, right? It turns out that vehicle road damage doesn’t rise linearly with weight. Road damage rises with the fourth power of weight, and this means that a 40,000 pound truck does roughly 10,000 times more damage to roadways than the average car [1]!
In other words, one fully loaded 18-wheeler does the same damage to a road as 9600 cars. According to the American Trucking Associations (ATA), the trucking industry represents 11% of all vehicles on the road in the US, while paying 35% of all highway taxes. But if trucks represent 11% of vehicles, their heavy loads cause them to do 99% of all road damage! [2] The trucking industry paid $35 Billion in highway taxes in 2005, according to the ATA. Since most of the $100 Billion in highway taxes paid goes to maintenance (and US infrastructure maintenance is far behind), this implies that the trucking industry receives a $60 Billion annual subsidy from other drivers.
commenter :
Viga said
October 26, 2009 @ 10:24 am
Interesting.
Did you take pounds per inch into account when coming to this conclusion? Large rucks often have 18 wheels or more, generally all axles except the steer axle have dual wheels, and large truck tires are larger and wider than car tires, so they generally apply less pressure to the road surface per inch than cars do.
I’m not up on the numbers, but I do recall reading a study somewhere that showed that many cars actually do more damage than trucks. Of course, that would have to be excepting anywhere trucks make lots of tight turns. This is along the lines of the truth that a woman wearing high-heeled shoes does more damage to a sidewalk than an elephant.
Since your source refers only to “equivalent single axle loads” your calculation appears to be flawed. You are not looking at a 3,500lb car versus a 40,000lb truck (many of which weigh MUCH less than that fully loaded because things like Girl Scout Cookies and toilet paper just don’t weigh that much). Rather, you are looking at a 3,500lb car versus two axles of a semi-truck. The heaviest legal (non-permited) weight for one axle is 18,000lbs. This, combined with tire size, changes the equation drastically.
I don’t have tires handy to measure, but we can make some assumptions to arrive at a close guess, using a fully loaded 80,000lb and a 3,500lb car, with all tires at proper inflation levels.
3500/4=875 pounds per corner. The average car tire is 7 inches wide, and lays 5 inches of tread on the ground. This gives the car a contact patch of 35 square inches.
The average truck tire is 11 inches wide, lays 8 inches of tread on the ground, fully loaded, and has two tires per axle. This gives the large truck a contact patch of 176 square inches. 80,000/18=4,444.
875/35=25 pounds per square inch for the car.
4444/176=25.25 for the truck.