Municipal engineering focuses on municipal infrastructure, which generally involves specifying, designing, constructing, and maintaining roadways, sidewalks, water supply networks, sewers, street lighting, municipal solid waste management and disposal, public parks and cycling infrastructure. Where underground utility networks are concerned, it may also include the civil portion (conduits and access chambers) of the local distribution networks of electrical and telecommunications services. It can also include the optimizing of garbage collection and bus service networks. Some of these disciplines overlap with other civil engineering specialities, however, municipal engineering looks at optimizing the coordination of these infrastructure networks and services, as they are often built at the same time (for a given street or development project), and managed by the same municipal authority.