 West Diamond Avenue from MD 124 to MD 355 was assigned MD 924.By 1987, the MD 924 designation was removed—to be used on its current course in Harford County—and replaced with an extension of MD 117.MD 117's partial interchange with I-270 was constructed in 1987; to that point, MD 117's access to I-270 had been indirect via the Interstate's interchange with Quince Orchard Road, which had been built as a county highway concurrent with the freeway in 1956.