Metro has been distributing pamphlets to riders letting people know that there will not be any yellow line Metrorail service from September 10, 2022 to May 2023. If you usually take the yellow line to National Airport, give yourself extra time to take the blue line to the aiport instead during this time.
There will be no Metrorail service at all south of National Airport from September 10, 2022 to October 22, 2022.
Details on shuttle service and service interruptions at wmata.com/majorconstruction. Specifically, travel alternatives at https://wmata.com/initiatives/plans/Major-Blue-and-Yellow-Line-Construction/Travel-Alternatives.cfm.