Structures are currently a good condition in highway, with an average age of 14.7years. However, After 10 years, The old structure will be estimated 22% of the total structure. In this study, We have suggested the preventive maintenance methods such as preventive techniques and asset management for the deterioration of future by a lesson of failure cases of developed countries such as the United States.

This paper evaluates the load carrying capacity by investigating the current state of the bridge considering the strengthening effect. This study suggests effective bridge asset management plan based on the evaluation results of load carrying capacity of highway bridges.