<Ul> <Li> view </Li> <Li> talk </Li> <Li> edit </Li> </Ul> <Table> <Tr> <Td> </Td> </Tr> </Table> <P> The Honolulu Rail Transit Project (also known as the Honolulu High - Capacity Transit Corridor Project) is an urban rail rapid transit system under construction in Honolulu County, Oahu, Hawaii . The mostly - elevated system features design elements from both heavy rail systems and light metros, with a commuter rail - like design incorporated into trains and suburban stations . It will become the first large - scale publicly run metro system in the United States to feature platform screen doors . The first phase of the project, linking East Kapolei and Aloha Stadium, is scheduled to open in late 2020, while the second phase of the project continuing the line to Ala Moana Center across urban Honolulu is due to open in December 2025 . </P> <P> For more than 40 years, debate over the development of a rail system in Honolulu has been a major point of contention in local politics, especially leading into the 2008, 2012, and 2016 election cycles . Proponents of the system say it will alleviate worsening traffic congestion, already among the worst in the United States . They assert that the urban agglomeration in south Oahu is ideally suited to rail as it is constrained by mountains to a narrow strip along the coast, which has resulted in the fourth highest population density in the US . Rail opponent and freeway advocate Panos Prevedouros has questioned its cost effectiveness compared to alternatives and claims that it will have marginal impact on future congestion and that new roads will therefore still be required . </P>

When is honolulu rail transit expected to start operating
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