Ship Canal Bridge, Road bridge in Seattle, United States.

The Ship Canal Bridge is a double-deck steel truss bridge carrying Interstate 5 over Portage Bay in Seattle, between Capitol Hill and the University District. It is 4,429 ft (1,350 m) long, 119 ft wide at the upper deck and stands 182 ft above the canal. The upper deck carries traffic in both directions; the lower express deck runs southbound in the morning and northbound in the afternoon.

The bridge opened in 1962 as the largest infrastructure project of its kind in the Pacific Northwest at that time. Its completion marked a major milestone in developing Seattle's transportation network.

The bridge links two distinct neighborhoods and has become a defining symbol of Seattle's urban landscape. Daily, thousands of drivers experience the characteristic steel structure that marks the city's major transportation spine.

The bridge carries Interstate 5 traffic and is not accessible to pedestrians or cyclists. Visitors can view the structure from the water or from surrounding vantage points around the bay.

The lower deck features lanes that reverse direction based on time of day to adapt to traffic volume. This system maximizes traffic flow during morning and evening rush periods by moving traffic where it is needed most.