Transportation
Colorado transportation system connects its cities, residents, and visitors through diverse and well regulated modes.
Colorado's primary method of transportation is its highway system. Interstate 25 is the primary North/South highway in the state, connecting Denver, Colorado Springs, Pueblo, and Fort Collins, and Interstate 70 is the primary East/West route connecting Denver with the mountain communities and Grand Junction. The state is home to a network of US highways and state highways that provide access to much of the state, while smaller communities are only accessibly through county roads.
Denver International Airport (DIA) is the sixteenth busiest airport in the world and handles the bulk of non-military or commercial air traffic in and out of Colorado. Regional airports are located throughout Colorado.
AMTRAK operates two rail passenger lines through Colorado and the Regional Transportation District operates a light rail transit system in the Denver Metropolitan Area. Rail transport is important for energy, agriculture, and industrial use. Public transportation services offer both intra-city and inter-city bus services.
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