Environmental Review Toolkit

Section 4(f) Tutorial

Section 4(f) Overview

This section will start you off with a general overview of the statute known as Section 4(f). More detailed information about each topic presented here is available as you navigate through this site.

collapse list What is prudent?

An avoidance alternative is prudent if it meets the definition in 23 CFR 774.17, which includes, among other factors, assessing safety or operational problems; how well project purpose and need are met; the severity of social, economic, or environmental impacts; and the severity of impacts to environmental resources protected under other Federal statutes, among other factors. FHWA's evaluation of these factors begins with a "thumb on the scale" in favor of protecting Section 4(f) property, and includes consideration of the relative value of that property.