From Logan Airport
Exit from the airport towards Boston via the Sumner Tunnel. Go through the tunnel, and follow signs at the exit to I-93 north. Follow I-93 north to I-95 exit. Take I-95 south, as described below.

From the North
Take I-95 south (also called Route 128) to Exit 31A, which is Routes 4-225 towards Lexington.

From the South or West
Take the Mass Pike (I-90) East to Exit 14, which is I-95, north and south. Take I-95 (also called Route 128) north to Exit 31A, which is Routes 4-225 towards Lexington. Follow directions into Lexington below*

From Exit 31A on Route I-95
*Follow Rte. 4-225, called Bedford Street into Lexington. You will go through several traffic lights, past a little shopping area with a Stop & Shop supermarket, then past the Lexington Green on your right. After the Green, you'll come to the center of town. Take a right at the light in the center. You will be on Waltham Street. Go about one block. You'll see a municipal parking lot on the right. EG&H is in the red colonial building that faces on to both Waltham Street and the parking lot. Enter at the door where there is a small patch of grass and bike racks.