List of Interstate Highways in Washington
Interstate 90 (I-90) is the longest primary Interstate Highway in Washington, which connects Seattle to Spokane and the Idaho border, measuring , while I-82, connecting the Oregon border city of Umatilla to Elensburg via Yakima, is the shortest at . The longest auxiliary Interstate Highway in Washington is I-405, a bypass of Seattle through the Eastside, at , and the shortest is I-705, a spur into downtown Tacoma, at . One route, I-605, has been proposed over the years to form another Eastside bypass, however there are no plans to construct this fifth auxiliary route.
After passage of the Federal Aid Highway Act of 1956, which formed the Interstate Highway System, the American Association of State Highway Officials had approved I-5 and I-90 across Washington on August 17, 1957. I-82 was approved on October 17, 1957, two months after I-5 and I-90, as part of a addition to the Interstate Highway System.
Arkansas Highway System
Another convention in 1907 formed road districts, but this did not help the situation either. Although the need for improvement was obvious, the citizens had trouble finding funding for their goals. In December 1913, Arkansas formed the "Dollarway", which was the name of a concrete road with asphalt concrete topping. It was opened near Pine Bluff. By 1914, a segment of was opened, the longest paved stretch in the United States. Today, the route is mostly covered by Highway 365, although some original concrete segments are still visible, and the Dollarway Road portion has been listed on the National Register of Historic Places.