The reasons behind the resignation are not clear at this time, but The Architect's Newspaper reports that her departure had been rumored for months.
"The move comes as a blow to a city that had reserved high hopes for the former San Diego planning director. While she was able to accomplish much in that city-notably a new direction and general plan for the city's planning department, an expansion of public transit, preservation of several historic areas, and the revitalization of many neighborhood centers- it appears that many of her efforts in LA were stymied. Her firing had been rumored for months, according to a source in the planning department. Still many praised her accomplishments and her ability to push against the powers-that-be in City Hall."