Bridge life-cycle cost analysis (BLCCA), is life-cycle cost analysis for individual bridges assuming a planning or time horizon as the period of time over which all costs are to be estimated. Transportation officials consider BLCCA important for assisting with investment decisions. The calculation of life-cycle costs depends on the choice of a distinct time period (planning time horizon) over which operations and maintenance costs are accrued, discounted (NPV), and compared with cost of capital.