Needs
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To Sustain bridge for remaining life of BOT project
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Enabling smooth flow of traffic
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To Reduce Total Cost of Ownership (by reducing overall maintenance)
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To Avoid Mishap
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To Reduce Closure of Traffic movement
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Factors
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Lapse during Construction of Bridge
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Wear & Tear .i.e. effect of Aging
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Unattended minor repair i.e. Poor Maintenance
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Damages due to wrong selection of type of repair/rehabilitation method
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Faulty Design
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Damages due to excess loading
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Damage due to Accident
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