Maryland Route 99 is a state highway in the U.S. state of Maryland. Known as Old Frederick Road, the state highway runs 7.57 miles (12.18 km) from MD 32 near West Friendship east to U.S. Route 29 in Ellicott City. MD 99 parallels the north side of Interstate 70 (I-70) through a rural and suburban area in northeastern Howard County. MD 99, which follows the original 18th-century road west from Baltimore, was constructed as part of three state highways: MD 99, the original MD 100, and MD 105. All three highways were constructed between the early 1920s and early 1930s. MD 99 originally turned south along St. Johns Lane to US 40 and MD 144; in 1956, the state highway was rerouted along part of MD 100 and all of MD 105 to downtown Ellicott City. MD 99's eastern terminus was rolled back to US 29 in two steps in the late 1970s and late 1980s.

Maryland Route 32 (MD 32) is a state highway in the U.S. state of Maryland. The road runs 51.79 miles (83.35 km) from Interstate 97 (I-97) and MD 3 in Millersville west and north to Washington Road in Westminster. The 30 mile four- to six-lane freeway portion of MD 32 is the Patuxent Freeway between I-97 and I-70 in West Friendship. The freeway passes through Odenton and Fort Meade, the site of Fort George G. Meade and the National Security Agency (NSA), in western Anne Arundel County and along the southern part of Columbia in Howard County. Via I-97, MD 32 connects those communities with U.S. Route 50 (US 50)/US 301 in Annapolis. MD 32 also intersects the four primary highways connecting Baltimore and Washington: the Baltimore–Washington Parkway, US 1, I-95, and US 29. MD 32's north–south section, Sykesville Road, connects West Friendship and Westminster by way of Sykesville and Eldersburg in southern Carroll County.