An underpass is a type of passageway that allows pedestrians or vehicles to travel beneath a road, railway, or other obstacles. It is designed to improve safety and traffic flow by providing a dedicated space for crossing without interfering with the main roadway. Underpasses can be found in urban areas, parks, and near transportation hubs. These structures often feature ramps or stairs for access and may include lighting and signage for safety. Underpasses can also serve as locations for public art or community projects, enhancing the aesthetic appeal of the area. They are commonly associated with urban planning and infrastructure development.