Transit Oriented Development (TOD) is medium- to high-density development within a quarter- to half-mile radius of mass transit services such as bus, light-rail, and heavy-rail, creating a mutually beneficial relationship between residents and/or businesses and the transit services. The availability of transit services allows for more dense development without the land intensive demand for parking, while the proximity of large numbers of residents and/or workers supports existing investments or justifies new investments in mass transit and reduces the need for subsidies.