When on Westlake Drive, at the first traffic light, right onto the mall, immediate right onto the roadway at the mall all the way to the Transit Center. When leaving the Transit Center, use the same exit (entrance), then left on Westlake Drive, left on Democracy Boulevard, right on Fernwood Drive, back on route.
For updates and link to press release, see here: http://www2.montgomerycountymd.gov/mcgportalapps/Press_Detail.aspx?Item_ID=46194