Travel demand shifts point to a strategic investment paradigm Relatively uniform expansion paradigm, demographic and Nomic changes that may merit reconsideration of the optimal Uncertain shifts in demand patterns, with behavioral and eco. System in the United States is faced with significant and yet Preferences among young people and aging retirees are associ-Īted with shifts toward shorter trips and nonautomobile travel Tion in certain areas (and thus increased congestion) even asĭemand may level off or decrease in other areas (U.S. That transportation demand may see increasing concentra. On particular subsets of the road network, geographically dif-įerential population growth, and increased urbanization mean Moreover, trends such as increasing truck movements Three times its originally designed capacity (Connecticut DOTĢ014a). Greater demand than that for which it was initially designed.įor example, the section of I-84 that runs through Hartford,Ĭonnecticut, is subject to a daily volume that is more than Nevertheless, much of the highway system is subject to far ÂPost Peakâ transportation planning (Polzin and Chu 2014).
Just a short-term trend (Figure 2)âleading to discussions of VMT has leveled off in a way that appears to be more than Tion infrastructure has been subject to ever-increasing demand Infrastructure, fiscal constraints, the time horizon of analyses,ĭata constraints, and environmental risk factors.įrom 1970 through the 2008 economic recession, transporta.
Graphic shifts, travel demand trends, the aging of transportation Making particularly salient to transportation managersânowĪnd in the foreseeable future. There are a number of factors that make disinvestment decision Review of models and data, their findings, and their relevanceįactors Necessitating Disinvestment Analysis
This chapter summarizes both the literature review and the MAP-21 established requirements for a new Risk-basedĪsset Management Plan to be completed by each state. Sphere is climate change and its relationship to risk manage. Yet another issue of prominence in the transportation planning In federal reimbursements and long-term fiscal constraints andįunding stream uncertainty because of the considerable politi-Ĭal difficulty associated with reforming transportation finance,Ĭlimate Change and the Convergence of Risk Factors Term cash-flow issues resulting from an anticipated slowdown VMT, and increased vehicle efficiency have contributed toĪ crisis in transportation funding (Puentes and Prince 2003).īased on current spending and revenue trends, U.S.DOTĮstimates that the Highway Account of the Highway Trustįund will encounter a shortfall before the end of fiscal year Keeping pace with the requirements for system upkeep.ĭecreased buying power resulting from inflation, reduced Of transportation funding in the United States, are no longer Ing the incidences of both intentional and passive disinvest. With current operational standards and therefore create bottle-įiscal constraints at the national and state level are increas. For example, many older interchanges do not comply Older infrastructure may not meet current performance stan-ĭards. Pounding the physical deterioration of assets is the concept that Structure simply to maintain the same performance levels asīefore, let alone offer more capacity (AASHTO 2010).
Struction and replacement of aging interstate highway infra. The pressures of growth by AASHTO noted the need for recon. A 2010 study on the costs of underinvestment and Ity of the road infrastructure is significantly older than that Than 25 years old (Rodrigue 2013a) in some states the major. About 75% of the Interstate Highway System is more Transportation infrastructure management in the United 2010 AECOM 2011 Transportationįor America 2013 U.S. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.Īging infrastructure is broadly identified as a challenge for Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book.
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