In 2009, the City issued the Estuary Crossing Study(PDF, 6MB), which evaluated 17 possible ways to facilitate a comfortable crossing for people walking, biking and taking transit. A bridge was the top long-term recommendation.
In early 2021, the Estuary Crossing Study: Detailed Feasibility and Travel Demand Analysis(PDF, 12MB) was published, which further explored a smaller set of crossing options and studied the technical feasibility of a bicycle/pedestrian bridge that meets the Coast Guard navigational requirements. The study concluded that such a bridge is feasible. As a part of this analysis, a spreadsheet tool(XLSX, 6MB) was also developed to compare the expected usage of different crossing options.
With funding from the countywide transportation sales tax, the City is now developing a Project Initiation Document, which will position the project to receive funding for future phases, including construction.