Marquam Bridge from above
The Marquam Bridge (/ˈmɑrkəm/) is a double-deck, steel-truss cantilever bridge that carries Interstate 5 traffic across the Willamette River south of downtown Portland, Oregon, US. It is the busiest bridge in Oregon, carrying 135,900 vehicles a day as of 2008. The upper deck carries northbound traffic; the lower deck carries southbound traffic.