👉 Interstate engineering refers to the specialized field focused on designing, constructing, and maintaining transportation infrastructure, particularly highways, bridges, tunnels, and related facilities, across state lines in the United States. It involves a multidisciplinary approach, integrating civil engineering, transportation planning, environmental science, and regulatory compliance to ensure the safety, efficiency, and sustainability of these critical infrastructure systems. Interstate engineers work within federal guidelines set by agencies like the Federal Highway Administration (FHWA) and collaborate with state transportation departments to address complex challenges such as traffic flow optimization, structural integrity, environmental impact mitigation, and compliance with interstate commerce laws. This field is essential for connecting communities, facilitating economic growth, and ensuring seamless mobility across state boundaries.