If you hate the feeling of being boxed in on the interstate by a couple of semitrailer trucks, you likely won’t be thrilled with the latest study of freight traffic in America.

In 10 years, an additional 1.8 million trucks will be sharing the roadways, and in 20 years, another truck will have been added for every two trucks today, according to a new report from the American Association of State Highway and Transportation Officials (AASHTO).

The AASHTO report titled “Unlocking Freight” found that America’s freight system requires investments well beyond current levels and said the country is facing a crisis when it comes to the system that supports the movement of freight.

“The simple fact is: No transportation, no economy,” said AASHTO President Larry Brown at the annual meeting of the Mississippi Valley Conference of State Highway and Transportation Officials in Des Moines. “They are inseparable. We must invest to maintain and strengthen the American ‘transconomy.'”

The report found that although more long-distance freight is being moved by intermodal rail, trucks still carry 74 percent of the load. On average, 10,500 trucks travel on a typical segment of the interstate highway system each day, but by 2035 that number will increase to 22,700, with some of the more heavily used segments seeing upwards of 50,000 trucks per day.

Between 1980 and 2006, traffic on the interstates increased by 150 percent, yet interstate capacity increased only 15 percent.

Iowa Department of Transportation Director Nancy Richardson said at an Iowa news conference in response to the report that “states need greater investment and sound federal transportation policies to allow them to expand capacity when and where necessary.”