A2D2, or Ann Arbor Discovering Downtown, is a set of zoning amendments designed to implement the Calthorpe Plan for improving the downtown area.

http://www.a2gov.org/a2d2/Pages/AnnArbo.aspx

The proposed code changes page on the City site has more than enough details.

In the news

And downtown-watchers shouldn't be surprised if the theme of the continuing conversation focuses on elevating the guidelines from voluntary to mandatory.

News references