Interstate 182 (commonly abbreviated I-182) is an auxiliary Interstate Highway in the U.S. state of Washington. The highway runs for about 15.19 miles and functions as a primary east–west connector through the Tri-Cities metropolitan area, providing access between the city centers, regional services and the broader Interstate network.

Route description

I-182 begins at an interchange with Interstate 82 to the west of Richland, then travels eastward through developed and suburban areas before crossing to the city of Pasco. Along its alignment the highway shares pavement or parallels several numbered routes: it overlaps sections of U.S. Route 12, runs adjacent to Washington State Route 240 through portions of Richland, and connects with U.S. Route 395 in the Pasco area. The corridor serves both local trips within the Tri-Cities and longer-distance traffic accessing the inland northwest.

Major junctions and features

  • Western terminus at I-82, providing connections toward Yakima and the Columbia River Gorge.
  • Concurrencies and junctions with U.S. Route 12 for east–west flow through the cities.
  • Connections with Richland's arterial network, including access to local industrial and research areas.
  • Eastern approaches into Pasco and links to Tri-Cities destinations and regional routes such as U.S. 395.

History and development

The corridor that became I-182 was developed during the expansion of the Interstate system and subsequent regional planning for the Tri-Cities area. Built in stages in the later 20th century, the route was planned to improve access between the urban centers and to create a more direct connection between I-82 and U.S. Route 12. Construction and improvements occurred over multiple phases to respond to population growth, economic development, and transportation needs in the region.

Uses and regional importance

I-182 carries a mix of traffic types: commuter flows between Richland, Pasco and Kennewick; freight movements serving agricultural, manufacturing and distribution businesses; and travelers linking to national routes. The highway also provides convenient access to regional facilities such as airports, medical centers and portions of the Hanford area. Because it ties the Tri-Cities into the larger Interstate network via I-82 and U.S. highways, I-182 is significant for local mobility and the economy.

Notable facts and distinctions

As a three-digit Interstate, I-182 is an auxiliary route related to I-82 and is numbered to reflect that relationship. It is relatively short compared with mainline Interstates but plays an outsized role for the Tri-Cities region by concentrating several important junctions and serving as a primary east–west route. Travelers will commonly encounter signed overlaps with U.S. Route 12 and local state routes as the highway moves through urban and suburban corridors.

For more detailed route maps, traffic information and construction updates, consult state transportation resources and regional planning documents that cover highway operations in the Tri-Cities area. Additional context about the cities served by the route is available through local municipal and tourism sources.