construction of the interchange displaced over 4,000 people from their homes and cost $5.5 million ($ in ) - making it the most expensive half-mile of highway ever built at the time.

The mainline traffic of US 101 is at the top of the interchange, above the ramps, a rarity in stack interchanges. Other examples of similar configurations would later be constructed, including on the M25 interchange with M23 passing above the ramps (south of London),