Indirect and cumulative impacts

Legal requirements

Council on Environmental Quality Regulations (CEQ)

Considering cumulative effects under the National Environmental Policy Act (NEPA) is intended to assist agencies with analyzing cumulative effects during the NEPA process. It includes general principles, common cumulative effects assessment methodologies, resources for additional information, and background data.

FDM references

• FDM 25-1-1 socio-economic factors
• FDM 25-5-1 impact categories
• FDM 25-5-5 impacts on neighborhood and unity cohesion
• FDM 25-5-10 regional economic impacts
• FDM 25-5-15 public and private development plans

• FDM 25-5-17 indirect and cumulative effects of projects
• FDM 25-10-1 impact identification (resource identification)
• FDM 25-15-1 impact evaluation (use of a community profile)
• FDM 25-15-5 adaptation of the community profile to screening worksheets
• FDM 25-20-1 impact mitigation

Guidance

• WisDOT guidance for conducting an indirect effects analysis
• WisDOT’s pre-screening worksheet for determining the need to conduct a detailed indirect effects analysis
• WisDOT guidance for conducting a cumulative effects analysis
• NCHRP Report 466 desk reference for estimating the indirect effects of proposed transportation projects
• AASHTO Practitioner's Handbook
• U.S. Department of Transportation environmental stewardship and transportation infrastructure project reviews

FHWA

• Federal Highway Administration (FHWA) Environmental Review Toolkit
• Q&A Consideration of indirect and cumulative impacts in the NEPA process