TxDOT's environmental review process is explained in its Environmental Guide, which consists of two volumes:

Date	Title	Description	Format
08-19	Environmental Guide: Volume 1 Process	Explains how to use TxDOT’s Environmental Compliance Oversight System (ECOS) to environmentally approve transportation projects
08-19	Environmental Guide: Volume 2 Activity Instructions	Contains individual instructions for completing each of the Activities, Reviews, and Coordinations generated in ECOS that may be required to environmentally approve a given transportation project

In addition, the individual toolkits listed below contain forms, templates, and technical guidance that may be needed to complete activities generated in the Environmental Compliance Oversight System (ECOS).

We welcome feedback to help improve the toolkits. Email us with comments.

• Air Quality
• Archeological Sites and Cemeteries
• Bicycle and Pedestrian Accommodation
• Chapter 26, Parks and Wildlife Code
• Community Impacts Assessment
• Natural Resources
• Hazardous Materials
• Historic Resources
• Indirect and Cumulative Impacts
• National Environmental Policy Act (NEPA) and Project Development
• Public Involvement
• Right-of-Entry for Environmental Investigations
• Section 4(f), U.S. Department of Transportation Act
• Section 6(f), Land and Water Conservation Fund Act
• Traffic Noise