shipments. Transportation is the largest source of greenhouse gas emissions in the United States. The overwhelming majority of roads in the United States are...

Rail transportation in the United States consists primarily of freight shipments along a well integrated network of standard gauge private freight railroads...

The United States secretary of transportation is the head of the United States Department of Transportation. The secretary serves as the principal advisor...

The United States Department of Transportation (USDOT or DOT) is one of the executive departments of the U.S. federal government. It is headed by the...

The United States is serviced by a wide array of public transportation, including various forms of bus, rail, ferry, and sometimes, airline services. Most...

Transportation safety in the United States encompasses safety of transportation in the United States, including automobile crashes, airplane crashes, rail...

large role in the development of the United States from the industrial revolution in the Northeast (1820s–1850s) to the settlement of the West (1850s–1890s)...

Transportation in the United States is governed by laws and regulations of the federal government. The Department of Transportation is responsible for...

The United States Transportation Command (USTRANSCOM) is one of the eleven unified commands of the United States Department of Defense. In both times of...

The United States Virgin Islands (USVI) is the only place under United States jurisdiction where the rule of the road is to drive on the left. However...