United States interstate system mapped

Construction of the Highway System was declared finished in 1992. The cost of the Interstate Highway System’s construction was almost $114 billion (equal to $521 billion in 2020). The primary system has been extended many times by the expansion of being designations and creating new designations. Currently, all routes’ total length is more than 48.4 thousand miles (~78 thousand kilometers).

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Worldwide Airline Routes

Flying was innovative and discomforting in the early years of the 20th century. Notwithstanding all of the discomforting and limiting features of air journey, air travel increased in popularity. The number of airline travelers in the U.S. went from less than 6 thousand in 1926 to about 173 thousand in 1929.
Today, commercial flights over 10,000 kilometers (6213.7 miles) are a daily routine.

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