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There are 71 primary Interstate Highways in the Interstate Highway System, a network of freeways in the United States. These primary highways are assigned one- or two-digit route numbers, whereas their associated auxiliary Interstate Highways receive three-digit route numbers. Typically, odd-numbered Interstates run south–north, with lower ...
The state marked its portion of I-70 as the first project in the United States completed under the provisions of the new Federal-Aid Highway Act of 1956. [24] The Pennsylvania Turnpike could also be considered one of the first Interstate Highways, and is nicknamed "Grandfather of the Interstate System". [25]
Kentucky signs the western end of US 42 at US 31E/US 60, just west of I-65 US 43: 410: 660 US 31, US 45, US 90 in Mobile, AL: US 31 in Columbia, TN: 1934: current Alabama signs the southern end at US 90 north of downtown Mobile US 44: 238: 383 US 209/NY 55 northeast of Ellenville, NY: SR 3A in Plymouth, MA: 1926: current US 45: 1,297 [i]
In 1918, Wisconsin became the first state to number its highways in the field followed by Michigan the following year. [1] In 1926 the American Association of State Highway Officials (AASHO) established and numbered interstate routes (United States Numbered Highways), selecting the best roads in each state that could be connected to provide a national network of federal highways.
The following list contains the most notable road interchanges within the United States divided by each state, which are mainly part of the national Interstate Highway System and are all freeways intersecting with each other at a junction.
Auxiliary Interstate Highways (also called three-digit Interstate Highways) are a subset of highways within the United States' Interstate Highway System.The 323 auxiliary routes generally fall into three types: spur routes, which connect to or intersect the parent route at one end; bypasses, which connect to the parent route at both ends; and beltways, which form a circle that intersects the ...
This is a list of toll roads in the United States (and its territories). Included are current and future high-occupancy toll (HOT) lanes, express toll (ETL) lanes, and hybrid systems. HOV, as used in this article, is high occupancy vehicle. This list does not include items on the list of toll bridges, list of toll tunnels, nor list of ferry ...
The National Highway System Designation Act of 1995 (Pub. L. 104–59 (text), 109 Stat. 568, COMPS-1425) is a United States Act of Congress that was signed into law by President Bill Clinton on November 28, 1995. The legislation designated about 160,955 miles (259,032 km) of roads, including the Interstate Highway System, as the NHS.