Maryland Route 108

Maryland Route 108
MD 108 highlighted in red
Route information
Maintained by MDSHA
Length	34.23 mi[1] (55.09 km)
Existed	1927–present
Major junctions
West end	MD 27 in Damascus
Major intersections	MD 124 in Damascus MD 97 in Olney MD 182 in Sandy Spring MD 650 at Ashton MD 216 at Highland MD 32 in Clarksville US 29 in Columbia MD 100 / MD 104 in Columbia
East end	MD 175 in Columbia
Location
Country	United States
State	Maryland
Counties	Montgomery, Howard
Highway system
Maryland highway system Interstate US State Scenic Byways
← MD 107 → MD 109

Maryland Route 108 (MD 108) is a state highway in the U.S. state of Maryland. The highway runs 34.23 miles (55.09 km) from MD 27 in Damascus east to MD 175 in Columbia. MD 108 is an S-shaped highway that winds through northern Montgomery County and central Howard County. The highway connects the Montgomery County communities of Laytonsville, Olney, Sandy Spring, and Ashton with the Howard County villages of Highland and Clarksville. MD 108 serves as the northern edge of Columbia and connects several of the planned community's suburban villages.

MD 108 originally connected Damascus with Olney. This highway was constructed between the mid-1920s and early 1930s. MD 108 from Olney to Columbia, part of Clarksville Pike, was originally constructed as MD 28 from Olney to Ashton and the original MD 27—later U.S. Route 29 (US 29)—from Ashton to Columbia. The highway was constructed near Columbia in the mid-1910s and from there to Olney in the late 1910s. MD 108 east of US 29 originally consisted of a county road and MD 531, which was built in the early 1930s and later became MD 175. MD 108 was extended east from Olney to Ashton in the mid-1940s and from Ashton to MD 175 in 1960 after US 29's present highway was built. The highway was extended to its present eastern terminus in the mid-1970s. MD 108 was expanded to a divided highway in Columbia in the late 1980s and in Olney in the mid-1990s.