Maryland Route 150 (MD 150) is a state highway in the U.S. state of Maryland. Known for most of its length as either Eastern Avenue or Eastern Boulevard, the highway runs from U.S. Route 40 (US 40) in Baltimore east to Graces Quarters Road in Chase in eastern Baltimore County. MD 150 connects Baltimore with its southeastern suburbs of Dundalk, Essex, and Middle River. The state highway also links those communities with Interstate 95 (I-95), I-695, I-895, and Martin State Airport. MD 150 was constructed from Baltimore to Middle River and in Chase in the mid-1920s. The road was completed through Middle River in the early 1930s. Between 1942 and 1944, MD 150 was reconstructed as a four-lane divided highway with interchanges to improve access between Baltimore and the Glenn L. Martin Company aircraft manufacturing plant in Middle River. The highway has followed several routes since it was extended west into the city of Baltimore in the mid-1940s; the present route in East Baltimore was established shortly after 2000. Route description MD 150 is known as Eastern Avenue from just west of I-895 in Baltimore to the Back River between Dundalk and Essex. The highway is also named Eastern Avenue from Carroll Island Road in Middle River to the highway's eastern terminus in Chase. Between the two sections of Eastern Avenue, MD 150 follows Eastern Boulevard through Essex and Middle River. The state highway is maintained by the Baltimore City Department of Transportation in the city of Baltimore and by the Maryland State Highway Administration in Baltimore County. MD 150 is a part of the National Highway System as a rail-to-truck intermodal freight transport connection from its western terminus at US 40 to I-95 within Baltimore. The highway is also a National Highway System principal arterial from I-95 to Carroll Island Road in Middle River. Baltimore to Dundalk MD 150 begins at an intersection with US 40 (Pulaski Highway) in East Baltimore. The route heads south as Haven Street, a four-lane undivided street that passes through an industrial area. East of the Highlandtown neighborhood, MD 150 turns east onto Lombard Street, which crosses over three rail spurs that head south to Canton; one line splits from CSX's Philadelphia Subdivision railroad line, while the other two spring from the Amtrak's Northeast Corridor railroad line and are operated by Norfolk Southern Railway. The state highway's run on Lombard Street ends at Ponca