United States Department of Transportation
i
A framework for assessing transportation sustainability rating systems for implementation in U.S. state departments of transportation.
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2014-05-01
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[PDF-2.38 MB]
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Abstract:Sustainability has increased in popularity as a key indicator for planning transportation projects. With that
movement, evaluating the sustainability of transportation projects has become necessary for state
departments of transportation (DOTs). Transportation Sustainability Rating Systems (TSRS) have been
adopted for this purpose; however, different TSRSs employ different methods for determining or
quantifying sustainability, and emphasize different sustainability factors. Given the number, variability,
and specificity of TSRSs available, an evaluation and pairing exercise of available systems is needed to
help state DOTs select a system by determining to what extent a given system suits each state DOT’s
preferences.
This thesis presents a four-step framework that identifies the most important capabilities in a TSRS as
preferred by a state DOT and then facilitates weighting of those capabilities via a well-established
methodology, the Analytical Hierarchy Process. The thesis also presents the implementation of this
framework for Colorado DOT (CDOT), South Dakota DOT (SDDOT), Utah DOT (UDOT) and
Wyoming DOT (WYDOT). The framework resulted in the identification of INVEST to be the most
suitable TSRS for CDOT and WYDOT, GreenLITES as the most suitable TSRS for SDDOT, and the
results for UDOT were inconclusive. The framework developed for assessing TSRSs was proven to be a
viable means for determining rank and suitability of TSRS for DOTs.
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