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The National Academies

NCHRP 25-25/Task 54 [Final]

Evaluate Colorado's Area-wide Cumulative Effects Assessment (ACEA) Methodology as a Mechanism for Cumulative Impacts Analysis of Regional Transportation Plans
[ NCHRP 25-25 (Research for the AASHTO Committee on Environment and Sustainability) ]

  Project Data
Funds: $100,000
Research Agency: ICF Consulting, Inc.
Principal Investigator: Chris Paulsen
Effective Date: 7/7/2008
Completion Date: 9/30/2009
Comments: The project has been completed and the final report submitted to AASHTO.

The final report is available HERE.


Departments of Transportation (DOTs) are confronted with the challenge of performing meaningful and efficient environmental analysis, acceptable to the resource agencies involved, so that environmental information can inform and support decision-making at appropriate points in the transportation process. Colorado has made an initial attempt to address this challenge in its Area-wide Cumulative Effects Assessment (ACEA).  The ACEA evaluated the technical feasibility of conducting a meaningful cumulative impacts analysis on a regional scale for multiple major transportation corridor projects in the long-range transportation plan. 


NCHRP 25-25/Task 54 builds on the lessons learned in the ACEA to develop an alternative and flexible approach for conducting a region-wide cumulative effects analysis appropriate for natural and cultural resources.   

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