Transportation departments are government agencies responsible for overseeing and managing transportation systems within a specific area, such as a state or city. Their main duties include planning, building, and maintaining roads, bridges, and public transit systems. They also ensure the safety and efficiency of transportation networks, which are vital for economic growth and community connectivity. These departments often work closely with other organizations, such as public transit authorities and traffic management centers, to improve transportation services. They may also conduct research and implement policies related to traffic safety, environmental impact, and infrastructure development to enhance the overall transportation experience for residents and visitors.