The U.S. Department of Transportation (DOT) has released a study on the potential impacts of climate changes and land subsidence, the natural sinking of an area’s land mass, on transportation infrastructure in the U.S. Gulf Coast region. It is phase one of a three part study.

“This study provides transportation planners in the Gulf Coast region with valuable information that will assist them as they make decisions for the future,” said U.S. Secretary of Transportation Mary E. Peters.

The Impacts of Climate Change and Variability on Transportation Systems and Infrastructure: Gulf Coast Study, Phase I, provides an assessment of the vulnerabilities of transportation systems in the region to potential changes in weather patterns and related impacts, as well as the effect of natural land subsidence and other environmental factors in the region. The area examined by the study includes 48 contiguous counties in four states, running from Galveston, Texas, to Mobile, Ala.

Based on 21 simulation models and a range of emissions scenarios, the study found that potential changes in climate over the next 50 to 100 years could disrupt transportation services in the region. Twenty-seven percent of major roads, 9 percent of rail lines and 72 percent of area ports are at or below 4 ft. in elevation, and could be vulnerable to flooding due to future sea level rise and natural sinking of the area’s land mass. The study is designed to help state and local officials as they develop their transportation plans and make investment decisions. Federal transportation officials will continue to work closely with state and local planners as they incorporate the study into their planning processes.

Subsequent phases of the study will focus on risks and adaptation strategies involved in planning, investment, design and operational decisions for infrastructure in the Gulf Coast region and nationwide. The study was performed in partnership with the U.S. Geological Survey and state and local researchers, and is one of 21 “synthesis and assessment” reports produced as part of the U.S. Climate Change Science Program.

For more information, visit http://climate.dot.gov.

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