In the mid 1990s, Key West Avenue in the western part of Rockville was completed and expanded to a six-lane divided highway. MD 28 was moved to the improved highway to bypass the parallel stretch of Darnestown Road by 1999. Between 2002 and 2004, MD 28 was widened to a four- to six-lane divided highway between MD 124 and the west end of Key West Avenue. In 2002, Norbeck Road was completed between the eastern terminus of MD 28 and the MD 650-MD 198 intersection.