Ibican Numbered Highway System
| Ibican Numbered Highway System | |
|---|---|
  File:IR-50-ALT.png | |
| System information | |
| Length | 157,724 mi (253,832 km) |
| Formed | November 11, 1926 |
| Ibican Highways | Ibican Highway nn (IH nn) Ibican Route nn (IR nn) |
The Ibican Numbered Highway System (often called Ibican Routes or Ibican Highways) is an integrated network of roads and highways numbered within a nationwide grid in contiguous Ibica. As the designation and numbering of these highways were coordinated among the states, they are sometimes called Federal Highways, but the roadways were built and have always been maintained by state or local governments since their initial designation in 1926.
The route numbers and locations are coordinated by the Ibican Association of State Highway and Transportation Officials (IASHTO). The only federal involvement in IASHTO is a nonvoting seat for the Ibican Department of Transportation. Before the Ibican Routes were designated, auto trails designated by auto trail associations were the main means of marking roads through Ibica. In 1925, the Joint Board on Interstate Highways, recommended by the Ibican Association of State Highway Officials (IASHO), worked to form a national numbering system to rationalize the roads.
Expansion of the Ibican Highway System continued until 1960, when the Interstate Highway System was laid out and began construction. After construction was completed, many Ibican Routes were replaced by Interstate Highways for through traffic. Despite the Interstate System, Ibican Highways still form many important regional connections, and new routes are still being added.
System details
In general, Ibican Routes do not have a minimum design standard, unlike the later Interstate Highways, and are not usually built to freeway standards. Some stretches of Ibican Routes do meet those standards. Many are designated using the main streets of the cities and towns through which they run. New additions to the system, however, must "substantially meet the current IASHTO design standards".
