Document Type


Publication Date


Subject: LCSH

Sustainable engineering, Sustainability, Transportation--United States


Environmental Engineering | Industrial Engineering | Mechanical Engineering | Transportation Engineering


Sustainable transportation in the U.S. is essential for long-term economic growth and mobility, and environmental preservation. Using a non-radial slack-based measurement data envelopment analysis (SBM-DEA) model and state-level data, this study assesses the environmental efficiency of the transportation sector in the U.S. from years 2004 to 2012. In addition to environmental efficiency, carbon efficiency and potential carbon reduction were estimated for the 50 U.S. states. The findings of this study reveal that U.S. transportation sector was environmentally inefficient; U.S. states had an average transportation environmental efficiency score below 0.64. Therefore the states could substantially reduce carbon emissions to improve the environmental efficiency of their transportation sectors.


This is the authors' accepted version of the article published in Transportation Research Part D Transport and Environment. The published article may be accessed at



Publisher Citation

Yong Shin Park · Siew Hoon Lim · Gokhan Egilmez ·Joseph Szmerekovsky. Environmental efficiency assessment of U.S. transport sector: A slack-based data envelopment analysis approach. September 2016 Transportation Research Part D Transport and Environment 09/2016; DOI:10.1016/j.trd.2016.09.009