This $6 billion project consists of six major segments: West Approach, West Span, Yerba Buena Island Transition, Self Anchored Suspension (SAS), Skyway and Oakland Touchdown. The SAS is the most complex and the largest single public works project in California currently under construction at a cost of $1.4 billion. It is the world’s largest single tower self-anchored suspension bridge with a design life of 150 years. The Oakland Touchdown (OTD) connects Interstate-80 in Oakland with the new side-by-side decks of the East Span of the SFOBB.

CALTROP, for the SAS project, is a major consultant to Caltrans providing quality assurance, fabrication oversight, dimensional surveying, materials engineering and risk management for the construction of this unique project, including the management of a staff of 100 engineers, inspectors, technicians, administrators and managers working around the clock in five countries: China, Japan, Korea, England and the U.S.