 The highway descends into the valley of the North Branch of the Patapsco River and crosses the river and the Baltimore–Carroll county line at the northern end of the river's impoundment, Liberty Reservoir.MD 140 continues northwest as Baltimore Boulevard, now again a four-lane divided highway.The first of several segments of the highway's old alignment, Old Westminster Pike, splits to the southwest as the highway approaches Finksburg, where the highway intersects MD 879, which heads north as Cedarhurst Road and south as Old Gamber Road, and MD 91, which heads north as Emory Road and south as Gamber Road.