Duxbury were completed by 1963 when the Route 3 designation was moved onto the completed freeway. The former Route 3 highways became Route 3A in Quincy and from Kingston south, the remainder became Route 53. Route 3 was connected to the Southeast Expressway in Milton by using Granite Avenue as a link from Gallivan Boulevard. Until around 1965, the northern portion of the Pilgrims Highway, from current Exit 36 (Derby Street) in Hingham, was also signed as Route 128, which continued past the exit on surface streets to Hull. However, by 1966 the 128 designation was removed past its intersection with Route 3 in Braintree (and thus from the Pilgrims Highway entirely) and the surface portion became Massachusetts Route 228. Route 3 was then taken off its remaining pathway along surface streets in Boston and extended up the Southeast Expressway and Central Artery in 1971 to the Storrow Drive exit. The routing of Route 3 has changed little since that time. A re-signing project from 2006 to 2009 changed exit 20 to exit 20A for I-93 south and exit 20B for I-93 north. In the process, the ramp carrying Route 3 to I-93 north was no longer signed as part of Route 3. Separate signs indicating Route 3's routing along I-93 were to be installed on exit sign support poles in 2011. Future Milepost-based exit numbering Route 3 was one of the freeways whose exits were once numbered with the "25 is 128" system, in which the Braintree Split was numbered "Exit 25" (due to it being the exit for Route 128), with numbers increasing away from Boston and decreasing toward Boston. Under the old system, the Sagamore Rotary was (on paper) "Exit 43." When the first of the highway were resurfaced in 1975-76, the new numbers were instituted in that section. The Braintree section wasn't resurfaced in 1978, leaving a two-year gap when half the highway was on the new system while the other half was on the old system. During that time, the exit to Route 14 was "Exit 11" northbound and "Exit 33" southbound. Exit numbers on Route 3 were to be changed to those based on highway mileposts under a MassDOT project due to start in 2016, but this project was postponed. On November 18, 2019, MassDOT confirmed that, beginning in late summer 2020, the exit renumbering project will begin. The work was scheduled to begin