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<p>This paper shows a new approach to the problem of rehabilitation and widening of bridges. Some unique factors are being employed to improve the Indiana Toll Road. The first requirement for the design was to keep two lanes in each direction during the whole construction process minimizing the traffic impediments so the complete demolition of structures was not an option. Therefore a very important engineering effort has been done. After a careful identification of the pre-existing damages, the right treatment was implemented in each element taking into account a life expectancy of 50 years. A special treatment against damages produced by de-icing salts has been designed using cathodic protection to avoid cell effect. Each stage of the construction process for the widening has been analyzed coordinating geometrical and structural conditions with traffic management.</p>

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<p>The creation of the concept and denomination of the extradosed bridge is attributed to the French engineer Jacques Mathivat, who, in 1988, coined this term for the first time referring to the solution he proposed for the Àrret Darré Viaduct. In that proposal, prestressing cables extended out from the upper part of the deck were anchored to a low tower in order to gain eccentricity. Even though this option implied material savings with regard to other more conventional solutions, it was rejected. Nevertheless, Mathivat’s proposal inspired the Japanese who, in 1994, built Odawara Blueway Bridge in Japan. Since then, approximately one hundred extradosed bridges have been built all over the world.</p>