Mixed-use development is designed to allow a variety of land uses, including office, commercial, residential, live/work, and—in some cases—industrial or manufacturing, to be combined within a single development or district. Commercial and market-rate residential units are sometimes used to subsidize affordable units. In addition, cost savings including shared parking arrangements shared costs for building operation, maintenance, and security, and higher density development can improve housing affordability. In addition to reducing the costs of housing, mixed-use development may also reduce traffic and transportation burdens to residents and has the potential for creating job opportunities near affordable housing.