We encourage you to review additional Section 4(f) materials beyond this document in order to increase your understanding of the statute. The document includes the following materials:

FHWA POLICY & GUIDANCE:

FHWA NEPA Regulation, 23 CFR 771
Section of regulation dealing with Section 4(f): 23 CFR 771.135
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Section 4(f) Policy Paper (June 7, 1989)
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FHWA Technical Advisory, Guidance for Preparing and Processing Environmental and Section 4(f) Documents (October 30, 1987)
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Interim Guidance on Applying Section 4(f) on Transportation Enhancement Projects and National Recreational Trails Projects (August 22, 1994)
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Alternatives Selection Process for Projects Involving Section 4(f) of the DOT Act (November 15, 1989)
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National Evaluations for Projects with Minor Section 4(f) Involvements with Historic Sites (December 23, 1986)
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National Evaluations for Projects with Minor Section 4(f) Involvements with Public Parks, Recreation Lands, and Wildlife and Waterfowl Refuges (December 23, 1986)
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Access Ramps to Public Boat Landing Areas
(April 22, 1986)
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Section 4(f) Constructive Use (November 12, 1985)
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Section 4(f) Involvements, Wildlife and Scenic River Corridors (June 6, 1978)
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Negative Declaration/Section 4(f) Statement for Independent Bikeway or Walkway Construction Projects (May 23, 1977)
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Programmatic Section 4(f) Evaluation and Approval for
FHWA Projects that Necessitate the Use of Historic Bridges
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Credits
The following people have contributed to the development of this interactive document:

Maryland State Highway Administration — Anne Elrays, Bruce Grey, Allison Grooms, Gay Olsen, Cynthia Simpson and Lorraine Strow

Federal Highway Administration — Dave Gamble, Vance Hobbs and Dan Johnson

KCI Technologies, Inc. — Brian Bernstein, Chris Carbone and Michael McLaughlin

We would also like to thank all the individuals who reviewed and commented on preliminary versions of this document, as well as the following contributors of photography: The Maryland Department of Natural Resources, The National Park Service, and Brian Brasher from FHWA, Tennessee Division (Overton Park photos).