Abstract
Tokyo Gate Bridge, nicknamed Dinosaur Bridge because of its shape, opened to traffic on February 12, 2012. A light-up was held on April 25 of the same year. Symbolic lighting was designed to enhance the peculiar form of this bridge that serves as a new gateway to Tokyo. Various committees executed detailed examinations for this major public structure; maritime experts carried out studies to prevent interference with shipping; bridge design and construction experts were consulted. Overall planning and design took nine years to complete. As a result, each truss is lit individually; light dispersion from color LEDs on the sides of the bridge is tightly controlled; bridge footings and the underside of the span are attractively lit. In particular, colors of LEDs used to light the sides are changed each month to give a seasonal feel; every hour on the hour light variations give the impression of waves; thus the overall lighting is dynamic. In consideration of the environment and energy conservation, solar power is used for about 40 percent of the scenic lighting. In autumn 2013, the lighting design of Tokyo Gate Bridge received the Award of Excellence from Illuminating Engineering Society of North America (IESNA).
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