Map courtesy of the SFCTA Construction has occurred for years to prepare San Francisco Bay islands, such as Yerba Buena Island seen in map, for new neighborhoods, with new highway links to the main city and mobility options. With some 8,000 new housing units and three master-planned neighborhoods anticipated by the middle of next decade on Treasure Island and Yerba Buena Island, the San Francisco County Transportation Authority is overseeing construction of various mobility projects. Two are slated to complete this year, with another, a multiuse path, in various stages of design, bidding or funding. The program aims “to really prepare [Yerba Buena] Island for massive growth,” says Tilly Chang, authority executive director. In past years, it oversaw construction of new I-80 ramps and an interchange and an overlook offering sweeping views and park amenities. The current projects focus more on non-vehicular transport across the two islands.…