Panametrics, 221 Crescent St., Waltham

From 128/95 take Exit 26 (Rt.20 East) to third set of lights (Shell station on left). At the next (fourth) set of lights (BayBank is in front of you to the right) turn right onto Prospect St. After two sets of lights, you will go under a railroad overpass and over the Charles River. At the next set of lights turn right onto Crescent St. and make an almost immediate right turn into Panametrics parking lot entrance. Park in any spot that is not reserved by name.