Editing Infinite Corridor (section)

===Different levels===
The Infinite Corridor has five levels: the basement, and floors 1 through 4. Elevators in Lobby 7 and in Lobby 10 provide access to each floor, as do numerous stairways.  The elevators in Lobby 10 also provide access to the Barker Engineering Library, via the 5th floor.  In accordance with its US location, MIT buildings usually use the American [[floor numbering]] scheme.

The first floor (called the "ground floor" by some) is the most traveled level, and is often the only one referred to as ''the'' Infinite Corridor. It is most of a floor above ground level at Massachusetts Avenue (the west end, Building 7), and in areas is a full floor up, with a [[parking lot]] entrance passing underneath (this entrance crosses the basement-level corridor at grade between Buildings 7 and 3). At its east end in Building 8, it is also about half a floor up.  The Basement Infinite Corridor mirrors the first floor passage, but connects to the extensive below-grade system of tunnels connecting many buildings.