By Esther C. Baird/Tri-Town Transcript columnist First Published in the Tri-Town Transcript April 23, 2014 BOXFORD There are many milestones that we celebrate in our culture. At age 16 you can drive, 18 you can vote, 21 you can drink, 25 you can rent a car (an underrated milestone in my road-tripping opinion), at 40…