Waltham/Old Sudbury Rd
Driving north on Rte 126/Concord St, and turn right onto Waltham Rd to take a shortcut to Rte. 117. This turns into Old Sudbury Rd.
As you come into open farm space, the road will curve to the left. About a 1/2 mile down, Lincoln PO is usually waiting w/ radar (where the houses resume). Speed limit is 30 and they’ll nail you for anything over.