Route 103 continues south then veers to the southeast along Willett Avenue as it heads towards the town of Barrington.

In Barrington, it continues east as County Road, then meets with and overlaps Route 114 for a second time as the routes cross the Barrington and Palmer rivers into the town of Warren.

When the main road was moved to current US 6, it at first continued to use Waterman Avenue via MA 114A and County Street to the state line.

The current alignment of Route 103 along Warren Avenue in East Providence was also US 6 before I-195 was built.

At the south end of Bullocks Point Avenue in Crescent Park, Route 103A turns east onto Crescent View Avenue, which later ends back at Willett Avenue/Route 103.