Some subways have been canceled, destroyed, buried or leased for other purposes. In 2022, Institute of Planning and Development of Prague (IPR) prepared a study of the revitalization of the Prague subways.
Some subways have been abandoned, demolished, hidden, or rented out for alternative functions. In 2022, the Institute of Planning and Development of Prague (IPR) prepared an analysis of the revitalization efforts for the Prague metro system.