AMP: 88 Location: I-495 and Chelmsford St, Chelmsford Reassurance shield after Mass. 110. AMP: 89 Location: I-495 and US 3, Chelmsford A truck blocked the US 3 exit sign – but, hey, button copy! Exit for 3 north towards Nashua, N.H. and the unnumbered Lowell Connector freeway. N to MA 38, S to MA 4 … Continue reading Interstate 495, MA 110 to US-3