Case Study:

Waterloo, Iowa

Methodology

Define the Scope

The first step is to identify the roadways or other transportation facilities that will experience significant changes in traffic volumes or speeds, and therefore in emissions or noise, as a result of the project. These may include facilities that are part of the project as well as other facilities that will experience changes in traffic. The project study area should encompass these facilities.

For a regional transportation program or set of projects, the best approach may be to screen individual projects or areas to identify the cases of potential highest noise and emission impacts (e.g., congested intersections or high-volume roadways) and to select these for more detailed analysis.

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