Freeway removal is a public policy of urban planning policy to demolish freeways and create mixed-use urban areas, parks, residential, commercial, or other land uses. Such highway removal is often part of a policy to promote smart growth, transit-oriented development, walkable and bicycle-friendly cities. In some cases freeways are re-imagined as boulevards, rebuilt as tunneled freeways (see tunnels) or relocated through less densely-developed areas.