From the west:
Take 495 to Exit 16 (King St). Go left onto King. Follow to first light, turn right onto 140. Follw to first light (route 1A) The Common is right in front of you.
From the north:
Take 128 (95) to 95 south, to the Wrentham, Route 1 exit (Foxboro Stadium exit). Follow 1 south past the home of the AFC champions to route 140. Head towards Wrentham for about 3 miles. The common is on your left.
Note that there is a sub/pizza shop and convenience store right around the corner, for snacks and sodas!