The Indiana Department of Transportation maintains and implements the state transportation system and operates an environmental policy section that ensures compliance with environmental laws and regulations. It also maintains an ecology and waterway permitting section that is responsible for evaluating the impact of projects on waterways and natural habitats. The department additionally operates an aviation division that maintains, integrates and improves the transportation system at state and local levels. It maintains a program development division that is responsible for the collection, analysis and reporting of traffic statistical data, as well as projection and bridge inspection data. In addition, the department is comprised of procurement, project accounting and budget sections. It maintains a location in Indianapolis.