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List of Interstate Highways. There are 70 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 ...
Primary Interstates are assigned one- or two-digit numbers, while shorter routes (such as spurs, loops, and short connecting roads) are assigned three-digit numbers where the last two digits match the parent route (thus, I-294 is a loop that connects at both ends to I-94, while I-787 is a short spur route attached to I-87). In the numbering ...
In the United States, future Interstate Highways include proposals to establish new mainline (one- and two-digit) routes to the Interstate Highway System.Included in this article are auxiliary Interstate Highways (designated by three-digit numbers) in varying stages of planning and construction, and the planned expansion of existing primary Interstate Highways.
State. Scenic. Legislative. The list of Interstate Highways in Pennsylvania encompasses 23 Interstate Highways —12 primary routes and 11 auxiliary routes—which exist entirely or partially in the U.S. state of Pennsylvania. In Pennsylvania, most of the Interstate Highways are maintained by the Pennsylvania Department of Transportation (PennDOT).
There are 31 Interstate Highways —9 main routes and 22 auxiliary routes—that exist entirely or partially in the U.S. state of New York, the most of any state. [1] In New York, Interstate Highways are mostly maintained by the New York State Department of Transportation (NYSDOT), with some exceptions. Unlike in some other states, Interstate ...
Interstate 90 Map of the contiguous United States with I-90 highlighted in red Route information Length 3,021.22 mi (4,862.18 km) Existed 1956–present NHS Entire route Major junctions West end SR 519 in Seattle, WA Major intersections I-5 in Seattle, WA I-15 near Butte, MT I-25 near Buffalo, WY I-35 in Albert Lea, MN I-55 in Chicago, IL I-65 in Gary, IN I-80 US 6 in Lake Station, IN I-75 in ...
Highway shields for I-5, I-580, and I-80 Bus. Loop. Interstate XX Business Loop (I-XX Bus.) This is a list of Interstate Highways in the U.S. state of California that have existed since the 1964 renumbering. It includes routes defined by the California State Legislature but never built, as well as routes entirely relinquished to local governments.
Interstate 77. Interstate 77 ( I-77) is a north–south Interstate Highway in the Eastern United States. It traverses diverse terrain, from the mountainous state of West Virginia to the rolling farmlands of North Carolina and Ohio. It largely supplants the old U.S. Route 21 (US 21) between Cleveland, Ohio, and Columbia, South Carolina, as an ...