I-93/MA 3/US 1: Southeast Expressway Kneeland Street signage I-93/MA 3/US 1: Central Artery Big Dig construction Leverett Circle (more Big Dig) I-93: Northern Expressway Back to US 1 main page | See? As I-93 SB ends, MA 128 begins. At least now. This also becomes I-95 NB, which is probably where the blue sign comes from. |