List of Interstate Highways
There are 70 primary Interstate Highways in the Interstate Highway System, a network of controlled-access freeways in the United States. They 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 numbers in the west and higher numbers in the east; even-numbered Interstates run west-east, with lower numbers in the south and higher numbers in the north. Highways whose route numbers are divisible by "5" usually represent major coast-to-coast or border-to-border routes (ex. I-10 travels from Santa Monica, California, to Jacksonville, Florida, traveling from the Pacific to Atlantic oceans). Additionally, auxiliary highways have their numbering system where a different number prefixes the number of its parent highway.
Mini Stack
In a 2007 study performed by "Forbes", the Mini Stack ranked number four in the United States in terms of delays with 22 million hours of delays each year. It was behind only Los Angeles' US 101 and I-405 interchange in California, Houston's I-610 and I-10 interchange in Texas, and Chicago's I-90/I-94 and I-290 interchange in Illinois.