Maine State Route 3  State Route 3 (abbreviated SR 3) is a long state highway located in southern Maine. Its western terminus is at State Route 8, State Route 11 and State Route 27 in Augusta. Its eastern terminus is at State Route 102 and State Route 198 in Mount Desert. As its single-digit number indicates, it is a major regional highway, connecting the Interstate 95 corridor to the Atlantic coast. Major cities and towns along the length of SR 3 include Augusta, Belfast, Ellsworth, and Bar Harbor. Nearly one-third of the overall length of SR 3 is overlapped by U.S. Route 1. SR 3 begins at Civic Center Drive (SR 8 / SR 11 / SR 27) in the northwest corner of Augusta. SR 3 heads east using the Augusta Bypass, a controlled-access road completed in 2004 to alleviate congestion in the city center caused by traffic headed to and from I-95. The bypass ends at North Belfast Avenue (US 202 / SR 9) on the east end of Augusta. SR 3 runs concurrently with US 202 and SR 9 (the Belfast Road) to the village of South China, where US 202 and SR 9 split to the north. SR 3 continues east to the city of Belfast, where it interchanges with US 1 west of downtown. US 1 and SR 3 run concurrently for over from Belfast through Bucksport, crossing the Penobscot Narrows Bridge over the Penobscot River. SR 15 joins US 1 and SR 3 in downtown Bucksport and splits to the south in Orland after . US 1 and SR 3 continue along the Acadia Highway to the city of Ellsworth. SR 3 leaves US 1 at The Triangle, an intersection at the south end of Ellsworth that has been the center of numerous traffic problems within that city . Continuing south through Trenton, the route crosses a causeway to Mount Desert Island and intersects with SR 102 and SR 198, which run along the island's western side. SR 3 turns east follows the eastern shore to the tourist town of Bar Harbor, then continues south through Acadia National Park to the village of Northeast Harbor. SR 3 intersects with SR 198 and turns north towards the village of Somesville. SR 3 and SR 198 intersect with SR 102 in Somesville; SR 3 ends and SR 198 turns north onto SR 102, eventually meeting SR 3 again near the Mount Desert Island causeway. On the southern end of Mount Desert Island, and along the concurrency with SR 198, SR 3 signs lack directional indicators.