The Urban Redevelopment Authority (URA) manages land supply in Singapore. As the national land use planning authority, the URA plans and facilitates Singapore's physical development through long-term strategic plans that guide development in a sustainable manner. The URA also acts as the main government land sales agent, selling state land to attract private investment for developing sites to support economic and social growth. Additionally, the URA takes on development and conservation roles to create a vibrant and livable city.