Impact Methodologies

Environmental - Operating

General References

The EPA Office of Transportation and Air Quality provides information and software in support of emission factor models including MOBILE5, MOBILE6, and PART5.

The EPA Support Center for Regulatory Air Models provides information and software for the Urban Airshed Model, CAL3QHC, and other air pollutant dispersion models.

National Cooperative Research Program Project 8-33, Quantifying air quality and other benefits and costs of Transportation Control Measures, reviews the state of practice and discusses needed advances in modeling emissions and air quality from transportation sources.

Guidance on estimating noise impacts of highway projects can be obtained from the Federal Highway Administration Office of Environment and Planning.