Today, Japan is home to the world's longest suspension, floating, and cable-stayed orthotropic deck bridges. In fact, major orthotropic viaducts in Tokyo are composed of more than 1,100 spans, and there are more than 250 orthotropic deck bridges of various sizes throughout the country.
In fact, the Federal Highway Administration (FHWA) and many other organizations recently sponsored the world's first conference in nearly 30 years focused exclusively on orthotropic deck bridges.
"Orthotropic deck bridges provide an excellent solution for large-scale structures where weight is an issue," FHWA's Nevai says, "such as cable-stayed and suspension bridges.
In southeast Alaska, for example, the agency uses eight movable orthotropic deck bridges to transfer vehicles from State-run ferries to the shore.
designers have managed to carve a niche for orthotropic deck bridges in the domestic and overseas markets despite the lack of standardization.
Another key factor in pushing ahead the domestic progress of orthotropic deck bridges is communication.