US 140's course out of Reisterstown featured sharper corners than MD 140's modern course; the U.S. Highway used Amy Brent Way through the I-795–MD 140 interchange and the paralleling road east of the Woodfield Court intersection. US 140 veered northwest from the present alignment, briefly following Glen Falls Road before crossing the North Branch of the Patapsco River—Liberty Reservoir had not yet been created—on a road that no longer exists. The highway continued along Old Westminster Pike on the southbound side of modern MD 140. In Finksburg, US 140 intersected MD 91, which followed what is now MD 879 (Old Gamber Road and Cedarhurst Road). The U.S. Highway briefly followed modern MD 140 then Old Westminster Pike, which now acts as a service road for northbound MD 140. Near the hamlet of Sandyville, US 140 began to follow Old Westminster Pike on the southbound side of MD 140.