Vista Ridge Tunnels OR
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Description: The Vista Ridge Tunnels, also known as the I-405 Tunnels, are a pair of highway tunnels located in Portland, Oregon, that facilitate the passage of Interstate 405 beneath the West Hills. Completed in 1969, these tunnels are a critical component of the city's transportation infrastructure, allowing for efficient traffic flow and reducing congestion in the downtown area. Each tunnel carries three lanes of traffic, with the northbound tunnel measuring approximately 1,100 feet in length and the southbound tunnel slightly shorter. The Vista Ridge Tunnels are notable for their engineering and design, which accommodate the challenging topography of the region while minimizing environmental impact.