Maryland Route 609

Maryland Route 28
Maryland Route 28 highlighted in red
Route information
Maintained by MDSHA
Length:	37.38 mi (60.16 km)
Existed:	1927 – present
Tourist routes:	Chesapeake and Ohio Canal Scenic Byway Antietam Campaign Scenic Byway
Major junctions
West end:	US 15 in Point of Rocks
	MD 85 at Tuscarora MD 109 in Beallsville MD 118 in Darnestown MD 124 in Gaithersburg MD 119 in Rockville I-270 in Rockville MD 355 in Rockville MD 586 in Rockville MD 115 at Norbeck MD 97 at Norbeck
East end:	MD 182 near Norwood
Location
Counties:	Frederick, Montgomery
Highway system
Maryland highway system Interstate US State Scenic Byways ← MD 27 US 29 →

Maryland Route 28 (MD 28) is a state highway in the U.S. state of Maryland. The state highway runs 37.38 miles (60.16 km) from U.S. Route 15 (US 15) in Point of Rocks east to MD 182 in Norwood. The western portion of MD 28 is a rural highway connecting several villages in southern Frederick County and western Montgomery County. By contrast, the eastern portion of the state highway is a major east–west commuter route, particularly within Gaithersburg and Rockville.

MD 28 was an original 1927 Maryland state highway. The state highway originally extended north and east through Olney to Ashton, but the highway was rolled back to Norbeck in the 1940s. MD 28 was extended east to its present eastern terminus in the early 1980s. The original western terminus was in Tuscarora, but the state highway was extended to Point of Rocks around 1970. In addition to being expanded to a multi-lane divided highway in central Montgomery County beginning in the 1970s, MD 28 was relocated in downtown Rockville in the 1940s, in eastern Rockville in the 1970s, and in western Rockville in the 1990s.

MD 28 follows portions of two Maryland Scenic Byways: the Chesapeake and Ohio Canal Scenic Byway from its western terminus in Point of Rocks to MD 109 in Beallsville and the Antietam Campaign Scenic Byway from MD 85 near Tuscarora to Mount Ephraim Road at Dickerson. The highway is also part of the National Highway System as a principal arterial from MD 112 in Darnestown to MD 182 in Norwood.