Now a subsidiary of Transport for London, London Underground Ltd. is one of the leading providers of transportation services in London. The company owns and operates a number of underground trains, tube stations, ticket counters and control centers. It is also responsible for the maintenance and renewal of the tube stations, escalators, lifts and tracks. In addition, the company conducts several customer survey programs to assess the performance of trains. It also undertakes several projects for the planning, development and construction of new underground tube stations and routes.