Geographic Information Systems

Geographic Information Systems (GIS) bring geographic measurements together with powerful tools for visualization, analysis and modeling. These technologies are being integrated into our planning and decision-making processes.

In accordance with the National Environmental Policy Act (NEPA) process, environmental documents are prepared that state:

  • the purpose and need of a TxDOT transportation project,
  • any existing environmental and socioeconomic conditions,
  • environmental consequences of the project, and
  • alternatives to the proposed alignment of the project.

The following GIS maps show environmental elements that are considered in Texas highway construction projects.