Cars that often carry 40-foot containers of goods shipped from Asia stand like an iron fence between the Missouri River and this Montana burg known for world-class fly fishing. They stretch as far as Sandee Cardinal can see when she stands outside her home on the river's west bank between Helena and Great Falls.

"What is that but a symbol of how America is down in the dumps right now?" Cardinal asked as she gazed at the cars that haven't moved for about three months.

The cars parked are the type that haul cargo from ships on the coast to points inland, mainly imported goods -- an area that's starting to slow down due to the weak economy. Analysts say transportation usually is among the first sectors to show signs of a downturn in the economy and with Americans feeling pinched -- employers eliminated 63,000 jobs last month amid declining consumer confidence -- it could be a while before the idle cars move.

"If you take a look at transportation, both trucking and rail, you will see that things started softening last summer," said Arnold Maltz, associate professor of supply-chain management at Arizona State University. "The reason you are seeing all those cars parked is that the consumer economy translates into slower imports."

The cars standing between Helena and Great Falls constitute 5 percent of the BNSF fleet, Melonas said.

Seasonal car storage is common, he said, but the number of cars now idle is exceptional.

Most of the parked cars are designed for intermodal transportation, when containers filled with imported goods are taken off vessels at U.S. ports and then transported by train, truck or both to distribution centers around the country.

For the first two months of 2008, the volume of intermodal rail freight in the United States was down 3.4 percent compared to the same period last year, according to the Association of American Railroads, an industry group based in Washington, D.C.

While shipments of store-ready consumer goods such as clothing have dipped, movement of coal, grain and ore have risen, according to the association.

In Long Beach, Calif., home of the nation's busiest port complex with Los Angeles, the movement of goods has been somewhat stagnant. About 7.3 million containers passed through the Port of Long Beach in 2007, the same as in 2006, port spokesman John Pope said.

"That was a big decline from the growth we'd seen in the past decade or so," Pope said. "Typically, there had been double-digit growth from year to year."

In January, Long Beach posted a decrease of about 12 percent in overall volume compared to January 2007. The situation was less extreme last month, with a 2 percent drop in overall volume compared to a year earlier.

While retailers have imported less goods to be hauled by rail or truck nationwide, exports leaving Long Beach rose as the weak dollar strengthened overseas purchases of U.S. goods, Pope said. Rising export volume -- including grain and wheat shipped by rail -- helped balance falling container imports for most of last year.

"It's a barometer of the economy," Pope said. "We're going to see the ebb and flow that mirrors what happens in the rest of the nation."