• General obligation bonds: Principal and interest are secured by the full faith and credit of the issuer and usually supported by either the issuer's unlimited or limited taxing power. In many cases, general obligation bonds are voter-approved.[8]
• Revenue bonds: Principal and interest are secured by revenues derived from tolls, charges or rents from the facility built with the proceeds of the bond issue. Public projects financed by revenue bonds include toll roads, bridges, airports, water and sewage treatment facilities, hospitals and subsidized housing. Many of these bonds are issued by special authorities created for that particular purpose