Interstate Bridge

Texte de Wikipédia en anglais, en attente de traduction.

The Interstate Bridge (also Columbia River Interstate Bridge, I-5 Bridge, Portland-Vancouver Interstate Bridge, Vancouver-Portland Bridge) is a pair of nearly identical steel vertical-lift, Parker through-truss bridges that carry Interstate 5 traffic over the Columbia River between Vancouver, Washington and Portland, Oregon in the United States. The present-day northbound bridge opened to traffic in 1917 as a single bridge carrying two-way traffic. Its name is a simple descriptive one as a bridge connecting two states, decades before the Interstate Highway System existed. A second twin bridge, which carries southbound traffic, opened in 1958. The twin bridges are each over 3,500 feet (1,067 m) long and carry three lanes of traffic. The bridges handle a combined 130,000 vehicles daily. It was added to the National Register of Historic Places in 1982, as the "Portland–Vancouver Highway Bridge". Since 2005, several proposals for replacing the bridge have been produced and debated. The bridge is considered responsible for traffic congestion of both road and river vehicles. Plans for a replacement bridge, known as the Columbia River Crossing (CRC) project, estimated to cost at least $3.4 billion, had come together by 2012 after many delays, but were very controversial, with both strong support and strong opposition. In late June 2013, the CRC project was canceled, after the Washington state legislature declined to authorize funding for the project. The Interstate Bridge Replacement Program, a joint effort between ODOT, WSDOT, Federal Highway Administration, Federal Transit Administration, Metro, Southwest Washington Regional Transportation Council, the cities of Portland and Vancouver, the Port of Portland, and the Port of Vancouver USA, was relaunched in 2017.