U.S. Route 20
U.S. Highway 20 (US 20) is an east–west United States highway that stretches from the Pacific Northwest all the way to New England. The "0" in its route number indicates that US 20 is a coast-to-coast route. Spanning , it is the longest road in the United States, and particularly from Newport, Oregon to Boston, Massachusetts, the route is roughly parallel to that of the newer Interstate 90 (I-90), which is in turn the longest Interstate Highway in the U.S. There is a discontinuity in the official designation of US 20 through Yellowstone National Park, with unnumbered roads used to traverse the park.
Sioux City, Iowa
Interstate 29 is a major controlled-access highway in Sioux City and the surrounding area providing easy access of the 20 mile stretch covering Sioux City and the majority of its suburbs. It approaches the city from Omaha to the south before curving northwest along the Missouri River near downtown. The highway then enters South Dakota and curves back to the north as it approaches Sioux Falls. Interstate 129 is an auxiliary Interstate that connects South Sioux City, Nebraska to the south side of Sioux City and works as a bypass for travelers to other surrounding suburbs. Interstate 129 also interconnects with U.S. Route 75 which is in expansion to expressway form connecting Sioux City to Worthington, Minnesota. U.S. Route 20, the longest road in the United States spanning is also in the works of expanding from a two-lane highway to four-lanes from Sioux City to Dubuque, Iowa which will provide faster and easier access comparable to Interstate 80 in Iowa. Sioux City operates automatic speed cameras on interstate highways. The cameras are operated by Redflex Holdings and are reported to provide approximately $4.5 million per year for the city budget. The state of South Dakota has been refusing to provide addresses associated with licence plates due to the large number of South Dakota residents fined by Sioux City.