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idealized distribution center networks. Modeling programs and other analyses may evaluate a variety of scenarios, examining the sensitivity of issues such as freight volume, population growth, customer change, sourcing, operations costs, and fuel costs. Linkages and infrastructure in any modeling must be compared against real-world data to reflect actual conditions, which network models sometimes have difficulty incorporating. Congestion and traffic on roadways may compromise what appears to be an ideal network, as may policies that promote passenger traffic take precedence over freight on rail networks. Companies often need to make off-line corrections, as network models do not always incorporate on-the- ground issues. Communities poised with The network models do not identify final sites, but only show available information or a recommended areas where freight facility nodes would yield the means to readily provide best performance. Companies typically use this information as a information may find starting point and attempt to find sites within a reasonable radius themselves in a better position of these recommendations. This radius may be larger (50 miles) or to compete for a facility. smaller (10 miles or less) depending on the nature of the network or facilities under consideration. Location screening In this process, non-transportation factors such as workforce, regulatory environment, utilities, and the cost of real estate become important factors in the location search. The location planning team will typically construct either a grid or a weighting and ranking model that uses demographic, socioeconomic, workforce, tax, regulatory, utility, and other data to determine how each candidate community matches the company's goals relative to the other communities under consideration. The location planning team, in addition to collecting available data from various public and private sources, may also submit a request for Freight Facility Location Selection: A Guide for Public Officials 35