The document summarizes a design concept called "Missing Link" for an international structural engineering design contest in Madrid, Spain. It describes how the design works using main girders, steel cantilevers, and cables to support the structure. It also offers crash barriers and handles noise and exhaust. The construction process involves four phases, starting with foundations and piers, then adding main girders, prestressing the girders, and finishing with the RC slab and cross girders. The conclusion notes it is a classic system adapted for its location and offers low life-cycle costs by constructing over the river to minimize disturbance.