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While all have experienced transportation network congestion and understand where it is, there is frequently an inability to use this information in a meaningful way in simulating distribution networks. Another trend that may influence the operation of freight on rail and roadway networks is the increasing level of competition for capacity between freight and passenger movement on both road and rail infrastructure. Competition with other types of development Freight users in some cases are prohibited from locating in ideal freight locations either due to land use prohibitions or conflicts (real or anticipated) with surrounding uses. In many cases, land that had previously been used for freight movement has now been converted to commercial, retail, or even residential use. The remaining developable industrial land becomes subject to increased limitations due to conflict with the new land uses. One example of this trend is the federal government's decision to expand military and associated operations at the Aberdeen Proving Ground and Ft. Meade in Maryland as a result of Base Realignment and Closure (BRAC) activity. In consequence, land which had previously been used or permitted as warehouse and industrial space along the key Interstate 95 East Coast distribution corridor will now be converted to office development instead of industrial or freight-related use. The opportunity to implement Urban Distribution Centers, with their clear advantages for fuel and carbon efficiency and truck VMT reduction, is dependent on suitable sites, most likely on brownfield properties with established, but perhaps dormant, industrial designation. The risk to such properties from land use conflicts could reduce supply chain performance by social as well as commercial and economic measures. 62 Freight Facility Location Selection: A Guide for Public Officials