This article lists planned or proposed high-speed rail projects, arranged by country. Although many nations have done preliminary feasibility studies, many lines are eventually shelved or postponed due to high cost, and only a few nations of those proposing are actively building high-speed rail lines. Planned or proposed lines are therefore separated here from lines that are under construction, some nations having both. High-speed rail is public transport by rail at speeds in excess of 200 km/h (125 mph). Africa African Integrated High Speed Railway Network In 2013, the African Union passed Agenda 2063, a 50-year development trajectory which includes establishing a continental free trade zone, a common passport, an end to armed conflict, an annual African economic forum, a space program, a Great African Museum, establishment of e-universities, and a continent-wide high speed rail network. Africa currently has the lowest rail density of all the inhabited continents, with 16 African countries lacking rail altogether, especially in Central Africa; most existing rail lines are single-track freight lines operating at 30 km/h which beeline from ports to industrial zones like mines and forests. The AU signed a Memorandum of Understanding with China in 2014 for the 30-50 year development of the continental rail system connecting all continental African capitals using modern rail technology, and facilitate interoperations by using a single gauge as opposed to the current nine. The goal of a high speed rail network is to facilitate intra-African trade and lower shipping costs. The initial timeline for 2022 was to have 100% of the preparatory work complete, but currently only 12.3% of the network has been studied, largely due to funding constraints. Pre-feasibility studies which have been completed so far include the Cotonou-Niamey-Ouagadougou-Abidjan Railway at 2891 km which would cost US$5.022 billion to build and rehabilitate, and US$866 million for equipment. The Djibouti-Libreville corridor was estimated to be 2366 km and cost US$5.277 billion, and the Dakar-N'Djamena-Djibouti corridor was estimated to be 5139 km and cost US$14.05 billion. It has not yet been specified which rail lines will operate at 330 km/h, 250 km/h, and 160 km/h. The Masterplan 2033 plans for 35,828 km of rail construction in Africa with the following projects. The first three are accelerated pilot projects actively under study/construction. The objectives by 2033 are to connect sixteen landlocked countries to sea ports, to provide interconnections between different regions, and provide Trans-Africa corridors. The Master Plan 2043