RUC quantify the impacts that road construction activities have on the mobility and safety of travelers, economics, and environment within the local community. RUCs have been applied to various aspects of decision analysis including planning, project design and development (preliminary engineering), and project construction options (work zones). During planning, user costs are a necessary component when conducting life-cycle cost analysis (LCCA) or benefit-cost analysis (BCA) relating to any future system designs, preventive strategies, safety or capacity improvements, or operation selections. During project design and development, a more refined calculation of LCCA or BCA is needed as more detailed information becomes available. The recalculated user costs may include components that were not previously considered. Before a project goes to construction, RUC information is used to determine contracting mechanisms, incentives and disincentives for construction time, and traffic control strategies that best balance construction costs with costs of delay to travelers and freight.