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​Lot 4A Visitor Parking Converts to Temporary Clinical Center Valet Parking

​​​Beginning today, Tuesday, February 22, Lot 4A (across from Building 31) will convert to valet parking for Building 10 patients and patient visitors only. This change is in effect until the new wing of the hospital (Surgery, Radiology and Laboratory Medicine) is complete in 2028.

Lot 4A, between Buildings 2 and 4, is normally a general visitor parking lot. After February 22, all general visitors are asked to use MLP-11 and the future *Lot 18* on the south side of campus, once it opens in summer 2022. The valet lot changes will be seamless for patients and patient visitors. Valet attendants will continue to be available from 7am – 7pm, Monday – Friday at the CRC North Lobby of Building 10.

As a reminder, also starting on February 22, the NIH will begin providing an Express Shuttle that services Lots 41 and 42 from the South Lobby of Building 10. The new Express Shuttle runs from 6:30am – 9:30am and the afternoons from 4:30pm – 7:30pm, providing exclusive service between the Building 10 South Lobby and the Lot 42 Employee Parking Lot (directly adjacent to Lot 41) on the south side of campus. For a complete schedule of this convenient service open to all NIH staff, please visit:​

In addition, starting on February 22, the MLP-9 and ACRF P-2/P-3 parking garages will be available to Building 10 occupants only. Parking in either of those locations will require a special "Building 10" sticker on the NIH parking permit. This change is taking place to offset the loss of parking for Building 10 occupants due to major construction projects, particularly to the west and north. Staff who work in surrounding buildings, and park in either of these locations, should consider parking in MLP-6, MLP-8, Lot 10-H or utilizing the new "Express Shuttle."

The Lot 4A Valet change is part of the NIH Building for All campaign, a joint effort of the Office of Research Services and the Office of Research Facilities. Along with the Express Shuttle and MLP-9/ACRF parking changes, these are the first of many mitigation strategies to address traffic and parking issues associated with major construction projects on the northwest portion of campus beginning in early to mid-2022. New construction includes:

* A five-story addition to the Vaccine Research Center

* A patient parking garage (MLP-14) and associated utility vault to service the Clinical Center

* A nine-story Surgery, Radiology and Laboratory Medicine (SRLM) wing of the hospital

The NIH recognizes and appreciates the considerable sacrifice staff are making as we undertake these major, critical improvements to our research capabilities, patient experience and hospital operations. Mitigation strategies aimed at reducing congestion and distributing parking were based on expert traffic modeling and other data-based decision-making.

Additional information about upcoming changes and the most up-to-date information to the NIH campus related to parking, traffic and associated construction are available at the NIH Traffic website:​
​For construction related questions, use the ORF Response mailbox ( For traffic/parking/access questions, use the ORS Information Line at or 301-594-6677.​​​

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