For almost five years now, President Obama has been making the argument that government "investments" in infrastructure are crucial to economic recovery. "Now we used to have the best infrastructure in the world here in America," the president lamented in 2011. "So how can we now sit back and let China build the best railroads? And let Europe build the best highways? And have Singapore build a nicer airport?"

In his recent economic speeches in Illinois, Missouri, Florida and Tennessee, the president again made a pitch for government spending for transportation and "putting people back to work rebuilding America's infrastructure." Create the infrastructure, in other words, and the jobs will come.

History says it doesn't work like that. Henry Ford and dozens of other auto makers put a car in almost every garage decades before the National Interstate and Defense Highways Act in 1956. The success of the car created a demand for roads. The government didn't build highways, and then Ford decided to create the Model T. Instead, the highways came as a byproduct of the entrepreneurial genius of Ford and others.

Moreover, the makers of autos, tires and headlights began building roads privately long before any state or the federal government got involved. The Lincoln Highway, the first transcontinental highway for cars, pieced together from new and existing roads in 1913, was conceived and partly built by entrepreneurs—Henry Joy of Packard Motor Car Co., Frank Seiberling of Goodyear and Carl Fisher, a maker of headlights and founder of the Indy 500.

Railroads are another example of the infrastructure-follows-entrepreneurship rule. Before the 1860s, almost all railroads were privately financed and built. One exception was in Michigan, where the state tried to build two railroads but lost money doing so, and thus happily sold both to private owners in 1846. When the federal government decided to do infrastructure in the 1860s, and build the transcontinental railroads (or "intercontinental railroad," as Mr. Obama called it in 2011), the laying of track followed the huge and successful private investments in railroads.