Secret passages on Microsoft main campus, episode 3

Another covered passage between buildings. The post Secret passages on Microsoft main campus, episode 3 appeared first on The Old New Thing.

May 21, 2025 - 04:40

Here’s another entry in the extremely sporadic series of secret passages on Microsoft main campus. (Part 1, Part 2.)

The Building 83 loading dock is attached to the Building 84 parking garage by a vehicle tunnel, but the tunnel is now blocked off by bollards. My guess is that the tunnel was originally intended to allow service vehicles from Building 84 convenient access to the Building 83 loading dock, but it had the side effect of allowing employees to drive between Building 84 and Building 83, and the unwanted traffic may have created problems, so they just erected bollards to close it off to vehicle traffic.

However, pedestrians can easily pass between the bollards. (Bicycles slightly less easily.) This creates a walkable/bikeable path from the southwest corner of the Building 84 parking garage on level P1 and the Building 83 loading dock on level P2, continuing up the ramp to level P1 and the Building 83 parking garage main entrance.

If you combine this tunnel with the existing passageway from Building 84 to Building 86, you have a path from Building 83 all the way to Building 86 without being exposed to the rain.

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