NEW GPS-iMOD air purification system coming to the building! 4600 Forbes is located at the corner of Forbes Boulevard and MD Rt 704 (Martin Luther King, Jr. Hwy), in the Washington Business Park. Building features extensive landscaping and is located within walking distance of deli and bank. Located one-half mile from New Carrollton Metro and Amtrak with shuttle service available, and one-half mile from Route 50 and I-495 intersection.