ⓘ List of Interstate Highways in Oregon. The Interstate Highways in Oregon are the segments of the national Dwight D. Eisenhower System of Interstate and Defense ..

                                     

ⓘ List of Interstate Highways in Oregon

The Interstate Highways in Oregon are the segments of the national Dwight D. Eisenhower System of Interstate and Defense Highways that are owned and maintained by the U.S. state of Oregon. On a national level, the standards and numbering for the system are handled by the Federal Highway Administration and the American Association of State Highway and Transportation Officials, while the highways in Oregon are maintained by the Oregon Department of Transportation.

These highways are built to Interstate Highway standards, meaning they are all freeways with minimum requirements for full control of access, design speeds of 50 to 70 miles per hour 80 to 115 km/h depending on type of terrain, a minimum of two travel lanes in each direction, and specific widths of lanes or shoulders; exceptions from these standards have to be approved by the FHWA. The numbering scheme used to designate the Interstates was developed by AASHTO, an organization composed of the various state departments of transportation in the United States.

The last section of the Interstate Highway system to be built in Oregon, on I-82 near Hermiston, opened on September 20, 1988.

                                     
  • of the total road mileage in the state, including Oregon s portion of the Interstate Highway System 729.57 mi 1, 174.13 km and many other highways ranging
  • Interstate 84 I - 84 in the U.S. state of Oregon is a major Interstate Highway that traverses the state from west to east. It is concurrent with U.S. Route
  • There are 70 primary Interstate Highways in the Interstate Highway System, a network of controlled - access freeways in the United States. They are assigned
  • Interstate 5 I - 5 in the U.S. state of Oregon is a major Interstate Highway that traverses the state from north to south. It travels to the west of the
  • The Interstate Highways in Washington is a group of seven designated Interstate Highways within the state of Washington in the Pacific Northwest region
  • Interstate 205 I - 205 is an auxiliary Interstate Highway in the Portland Vancouver metropolitan area in the U.S. states of Oregon and Washington. It serves
  • connections via other highways or based on future plans to fill in the gap in the Interstate or simply based on the shortness of the gap. The sections
  • state highway route numbers in the U.S. state of Oregon are the numbers assigned to state highways that are not part of either the national Interstate Highway
  • Interstate 82 I - 82 is an Interstate Highway in the Pacific Northwest region of the United States that travels through parts of Washington and Oregon
  • Interstate 405 I - 405, also known as the Stadium Freeway No. 61 is a short Interstate Highway in Portland, Oregon It forms a loop that travels around
  • originally created in 1956 as part of the Interstate Highway System, but was predated by several auto trails and highways built in the early 20th century
  • the highway is forked into two routes: Oregon Route 99E and Oregon Route 99W. Oregon Route 99 technically starts at an interchange with Interstate 5 at