The Baltimore–Washington Parkway (also referred to as the B–W Parkway) is a highway in the U. state of Maryland, running southwest from Baltimore to Washington, D. Commercial vehicles, including trucks, are prohibited within this stretch. This portion of the parkway is dedicated to Gladys Noon Spellman, a representative of Maryland's 5th congressional district, and has the unsigned Maryland Route 295 (MD 295) designation.From its southern terminus, the road continues north as a six-lane limited-access parkway with the unsigned MD 295 designation, containing brown signs featuring the Clarendon typeface.The parkway heads through wooded surroundings near industrial areas and passes over the Alexandria Branch of CSX's Capital Subdivision railroad line and MD 201, where there is a ramp from southbound MD 201 to the southbound B–W Parkway. Route 50 (US 50) near Cheverly in Prince George's County at the D. border, and continues northeast as a parkway maintained by the National Park Service (NPS) to MD 175 near Fort Meade, serving many federal institutions.This section is administered by the NPS' Greenbelt Park unit.
Between the 1980s and the 2000s, the NPS portion of the road was modernized.
After leaving park service boundaries the highway is maintained by the state and signed with the MD 295 designation.
This section of the parkway passes near Baltimore–Washington International Thurgood Marshall Airport.
Continuing northeast, the route curves to the northwest of Baltimore–Washington International Airport (the largest airport in Maryland), passing near an industrial park before reaching I-195, the main access road to the airport.
I-195 westbound provides access from the Baltimore–Washington Parkway to the Thomas Viaduct, which carries the B&O railroad line over the Patapsco River, and Patapsco Valley State Park, a 14,000-acre (57 km Still on a northeast track, the route widens to six lanes and intersects West Nursery Road near Linthicum, adjacent to the BWI Hotel District.