The bridge was first proposed for building in 1938. Building did not begin until 1947 because of the United States' involvement in World War II. The bridge was finally opened to traffic on July 30, 1952. Later in 1967, because traffic on the bridge was increasing, another side for the bridge was proposed. The proposal was agreed to, and funded by the state of Maryland. Building began once again in 1969 and was completed in 1973.