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The tunnel between the Template:Wmata and Template:Wmata stations, including the junction with the future Yellow Line, was built at the same time as the other Metro tunnels in downtown Washington in the early 1970s. During construction under 7th Street and U Street, where the cut-and-cover technique was used, street traffic and pedestrian access on those streets was difficult.[12]That led to the closure of the traditional retail businesses along the route.[來源請求]