Documents and studies

Noise reports

Final Noise Abatement Design Report Technical Memorandum for Noise Barrier C (October 2023) - PDF, 3.04 MB

Final Noise Abatement Design Report Technical Memorandum for Noise Barriers 13D and 13E (June 2023) - PDF, 8.14 MB

Final Noise Abatement Design Report (April 2023) - PDF, 27.8 MB

Preliminary Noise Analysis Tech Report (February 2020) - PDF, 2.6 MB

Preliminary Noise Analysis Tech Report Appendices (February 2020) - PDF, 52.4 MB

Environmental studies and approvals

FHWA Finding of No Significant Impact (June 2021) - PDF, 420 KB

FHWA FONSI Appendix A (June 2021) - PDF, 525 KB

Revised Environmental Assessment (May 2021) - PDF, 172 MB

NPS Section 4(f) Temporary Occupancy and De Minimis Impact Determination Concurrence (May 2021) - PDF, 3 MB

Fairfax County Park Authority Section 4(f) Temporary Occupancy and De Minimis Impact Determination Concurrence (May 2021) - PDF, 3 MB

Technical Memorandum Errata Sheet (May 2021) - PDF, 150 KB

National Park Service (NPS) Section 106 No Adverse Effect Concurrence (April 2020) - PDF, 160 KB

Environmental Assessment (February 2020) - PDF, 60 MB

Air Quality Tech Report (February 2020) - PDF, 9.7 MB

Air Quality Tech Report Appendices (February 2020) - PDF, 5.9 MB

Alternatives Development Technical Memo (February 2020) - PDF, 14.6 MB

George Washington Memorial Parkway Visualization Booklet (February 2020) - PDF, 84.1MB

Hazardous Materials Tech Memo (February 2020) - PDF, 1.7 MB

Hazardous Materials Tech Memo Appendices (February 2020) - PDF, 2.9 MB

Indirect & Cumulative Effects Tech Report (February 2020) - PDF, 6.2 MB

Natural Resources Tech Report (February 2020) - PDF, 11.8 MB

Natural Resources Tech Report Appendices (February 2020) - PDF, 40.7 MB

Section 4(f) & Section 6(f) Technical Memo (February 2020) - PDF, 11.5 MB

Socioeconomic and Land Use Tech Report (February 2020) - PDF, 5.7 MB

Cultural Resources Survey Tech Report (June 2019) - PDF, 12 MB

Virginia Department of Environmental Quality Approval for Virginia Stormwater Management Program regulations (January 2019) - PDF, 700 KB

Traffic and technical reports

Traffic & Transportation Technical Report Errata #3 (January 3, 2022) - PDF, 180 KB

Final Approved IJR Addendum with Signatures (December 2021) - PDF, 8.61 MB

Final IJR Addendum Appendices (December 2021) - PDF, 68 MB

Final Approved IJR with Signatures (June 2021) - PDF, 86 MB

Final Approved IJR Appendices (June 2021) - PDF, 284 MB

Traffic & Transportation Technical Report Errata #2 (June 1, 2020) - PDF, 267 KB

Traffic & Transportation Technical Report Errata (May 7, 2020) - PDF, 198 KB

Traffic & Transportation Technical Report and Appendices (February 2020) - PDF, 123 MB

Transportation management plan (TMP)

Final Approved Transportation Management Plan (April 2022) - PDF, 3.5 MB

Commonwealth Transportation Board approval

Commonwealth Transportation Board HOT Lanes Designation (April 2021) - PDF, 150 KB

I-495 American Legion Bridge transit/TDM plan

I-495 American Legion Bridge Transit /TDM Plan Final Report (March 2021) - PDF, 29.5 MB

495 NEXT revegetation conceptual plan

495 NEXT Revegetation Conceptual Plan Boards (April 2024, presented at April 8 and 11, 2024, project update meetings) - PDF, 13.8 MB

495 NEXT Corridor Revegetation Conceptual Plan (April 2024, presented at April 8 and 11, 2024, project update meetings) - PDF, 3.5 MB

Last updated: September 25, 2025