This FHWA interim guidance Memorandum provides a tiered approach for analyzing MSAT in NEPA documents. Depending on the specific project circumstances, FHWA has identified three levels of analysis: Projects with No Meaningful Potential MSAT Effects, or Exempt Projects, Projects with Low Potential MSAT Effects, and Projects with Higher Potential MSAT Effects. The Memorandum includes appendices to use for prototype language, incomplete and unavailable information, research, and mitigation resources. The MSAT Frequently Asked Questions document provides technical assistance information on how FHWA recommends that project sponsors can use MOVES for NEPA MSAT analysis.
