The first section of the Route 6-10 Connector, from the east end of the Olneyville Bypass to Dean Street, opened in 1972. At that time, Route 10 was removed from its former surface alignment to a temporary end at Dean Street. The ramp it had taken northbound to Harris Avenue was cut by the new construction; the abutments for the bridge over the Northeast Corridor and northbound Harris Avenue are still in place. U.S. Route 6 westbound was not moved, continuing to enter the Olneyville Bypass from Harris Avenue. A new ramp from Tobey Street to the bypass was added, replacing a removed left entrance from Broadway. The ramp from US 6 east to Westminster Street was also closed around this time, leaving its ramp to Broadway.