This is a new building code system that city planners are trying to implement in Austin, TX.
“CodeNEXT is a plan is to effectively do away with old fashioned things like neighborhood zoning and building use restrictions. Those are too complex and burdensome. Now that Austin has become a “destination city,” we shouldn’t live in houses on blocks in neighborhoods. Instead, we should be divided into “corridors,” “nodes” and “transit hubs.” While this may work for designing certain sectors of undeveloped land, it should not be imposed on existing neighborhoods against their will.