Is there an abbreviation for hallway?

There isn't a commonly used abbreviation for "hallway." However, you could use these options:

* Hall: This is a common and widely understood abbreviation.

* HWY: This abbreviation is less common but might be used in some contexts.

Keep in mind that using abbreviations might not always be appropriate, especially in formal writing. It's best to use the full word "hallway" unless the context clearly indicates what you mean.