Maryland Route 30 is a state highway in the U.S. state of Maryland. Known for most of its length as Hanover Pike, the highway runs 19.16 miles (30.84 km) from MD 140 in Reisterstown north to the Pennsylvania state line near Melrose, where the highway continues as Pennsylvania Route 94. MD 30 is a major, two-lane regional highway in western Baltimore County and northeastern Carroll County. Locally, the highway serves the towns of Manchester and Hampstead; the latter town is bypassed by the highway but served by a business route. Regionally, MD 30 connects Reisterstown and Baltimore with Hanover, Pennsylvania.

Maryland Route 140 is a 49-mile (79 km) state highway in the U.S. state of Maryland. The route runs from U.S. Route 1 and US 40 Truck in Baltimore northwest to the Pennsylvania border, where the road continues into that state as Pennsylvania Route 16. MD 140 passes through the northern part of central Maryland, connecting Baltimore, Pikesville, Reisterstown, Westminster, Taneytown, and Emmitsburg.