DPA provides a full range of technical expertise needed to prepare transportation planning studies, corridor studies, alternatives analyses, and environmental documents for highway, rail, and transit projects. Some of the services we provide include:

• Highway and rail location studies

• Environmental investigations

• Noise and air quality analysis

• Section 4(f) investigations and documentation

• Section 404 analysis and permitting

• NEPA documents, including environmental assessments and environmental impact statements

• Categorical exclusions

• Coordination and consultation with permitting agencies

• Community impact assessments

• Public involvement and consensus building services

• Geographic information technology