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The Inter-American Highway (IAH) is the Central American section of the Pan-American Highway and spans 5,470 kilometers (3,400 mi) between Nuevo Laredo, Mexico, and Panama City, Panama. History [ edit ]
1933 map of the Inter-American Highway portion of the Pan-American Highway. The official route of the Pan-American Highway through Mexico (where it is known as the Inter-American Highway) starts at Nuevo Laredo, Tamaulipas (opposite Laredo, Texas), and goes south to Mexico City along Mexican Federal Highway 85. [15]
The earliest evidence found of the old state road system is on a 1917 State Road Department map; [1] in 1923 the Florida State Legislature began writing the routes into law. Every two years, when the legislature met, new roads were added, at first by number, and later giving the SRD the ability to choose a number.
Modern American History. Vol. 5. pp. 53–77. doi: 10.1017/mah.2022.4. Browning, Edgar A (2011). Roadbuilding Construction Equipment at Work: Building the Interstate Highways through New England's Green Mountains. Icongrafix. ISBN 978-1-58388-277-1. Friedlaender, Ann Fetter (1965). The Interstate Highway System. A Study in Public Investment ...
With an original authorization of $25 billion (equivalent to $215 billion in 2023) [1] for the construction of 41,000 miles (66,000 km) of the Interstate Highway System over a 10-year period, it was the largest public works project in American history through that time. [2]
Interstate 4 (I-4) is an Interstate Highway located entirely within the US state of Florida, maintained by the Florida Department of Transportation (FDOT). Spanning 132.30 miles (212.92 km) along a generally southwest–northeast axis, I-4 is entirely concurrent with State Road 400 (SR 400).
Planning to extend the Interstate south to Miami began in 1968 after massive growth in Southwest Florida, which resulted in I-75 being realigned to travel on the eastern fringes of the Tampa Bay area, and the last portion of the highway was opened in 1993. For Florida Department of Transportation (FDOT) inventory purposes, it is designated as ...
Every section of U.S. Highway and Interstate Highway has a State Road number assigned to it, usually unsigned (for example, Interstate 4 is also unsigned SR 400). In addition to some named toll roads (for example, 91 and 821, which make up Florida's Turnpike) some minor State Roads are also unsigned (like SR 913 and SR 5054).