This paper explores a novel form for movable bridges which uses linkages as the main kinematic and structural elements. The proposed linkage-based movable bridge form was designed through 1) physical shape-finding, 2) generating a parametric model and kinematic equations, and 3) multi-objective structural optimization for minimum self-weight and minimum power for operation. Shape optimization is performed to determine the lengths and relative angles of members using a Multi- Objective Simulated Annealing algorithm. A nested sizing optimization procedure, using the Descent Local Search algorithm, designs the section profiles of members to meet the specifications of current American bridge design code. The ultimate result of this optimization procedure is a pareto-optimal set of solutions from which an engineer can choose based on design priorities. This case study meets the design requirements for the mobile section of the Woodrow Wilson Bridge Design Competition (November 1998) for the crossing between Alexandria, Virginia and Oxon Hill, Maryland, USA.