Maine State Route 3
|Maintained by MaineDOT|
|Length:||119.21 mi (191.85 km)|
|West end:||SR 8 / SR 11 / SR 27 in Augusta|
|US 1 from Belfast to Ellsworth|
|East end:||SR 102 / SR 198 in Mount Desert|
State Route 3 is part of Maine's system of numbered state highways, running from Route 8, 11 and 27 in Augusta to an intersection with Route 102 in the village of Somesville in the town of Mount Desert, on Mount Desert Island. Route 3 is 119.3 miles (192.0 km) in length.
Route 3 uses the Augusta Bypass, a controlled-access road completed in 2004 to alleviate congestion in the city center caused by traffic headed for Interstate 95. (Previous to this, Route 3 followed U.S. Route 202 into Augusta). It was extended in 2013 to reach Route 8, 11 and 27 just beyond the connection to I-95 and serve the new Alfond Center for Health and Cancer Center.  The bypass ends at U.S. Route 202 on the east end of Augusta, and Route 3 runs concurrently with U.S. 202 (the Belfast Road) to the village of South China, where U.S. 202 leaves to the north. Route 3 continues east to the city of Belfast, where it intersects U.S. 1.
U.S. 1 and Route 3 run concurrently from Belfast through Bucksport, crossing the Penobscot Narrows Bridge over the Penobscot River. From Bucksport, Route 3 and U.S. 1 continue along the Acadia Highway to the city of Ellsworth.
Route 3 leaves U.S. 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. Route 3 follows the island's eastern shore to the tourist town of Bar Harbor, then continues south through Acadia National Park to the village of Northeast Harbor. The route then turns north, running along with Route 198 to its end near the village of Somesville. Route 3 signs on this last portion of the Route lack directional indicators, as it almost forms a complete loop around the Eastern portion of Mount Desert Island. Signs state "Route" in replacement of directional signs. Directional signs start appearing just east of Seal Harbor when the highway starts turning North, though it is signed as East/West in keeping with the majority of the route.
|This section requires expansion with: up to date mileage. (October 2013)|
|Kennebec||Augusta||-1.0||SR 8 / SR 11 / SR 27 (Civic Center Drive)||Western terminus of SR 3|
|0.00||0.00||I‑95 – Augusta, Portland, Waterville, Bangor||I-95 Exit 113|
|0.7||1.1||SR 104 (West River Road) – Sidney, Augusta Riverfront|
|1.7||2.7||US 201 / SR 100 (Riverside Drive) – Winslow, Augusta East Side Business District, Camden, Rockland|
|2.6||4.2||US 202 / SR 9 west (North Belfast Drive)||Western terminus of US 202 and SR 9 concurrency|
|China||11.7||18.8||SR 32 north (Vassalboro Road)||Western terminus of SR 32 concurrency|
|13.0||20.9||SR 32 south (Windsor Road) – Windsor||Eastern terminus of SR 32 concurrency|
|13.3||21.4||US 202 / SR 9 east (Lakeview Drive) – China, Bangor||Eastern terminus of US 202 and SR 9 concurrency|
|Waldo||Liberty||28.2||45.4||SR 220 (West Main Street) – Thorndike, Liberty|
|Belmont||38.5||62.0||SR 131 (Morrill Road/Searsmont Road) – Searsmont, Union|
|Belfast||44.5||71.6||US 1 south / SR 52 – Camden, Rockland||Southern terminus of US 1 concurrency|
|45.1||72.6||SR 7 / SR 137 (Waldo Avenue) – Belfast, Brooks, Freedom||Interchange; southern terminus of SR 7 and SR 137;
Westbound exit and eastbound entrance via High St.
|45.8||73.7||SR 141 (Swan Lake Avenue) – Swanville||Southern terminus of SR 141|
|Stockton Springs||55.3||89.0||US 1A (Bangor Road) – Winterport, Bangor||Southern terminus of US 1A|
|Prospect||61.3||98.7||SR 174 (Fort Knox Road) – Fort Knox||Eastern terminus of SR 174|
|Hancock||Bucksport||62.8||101.1||SR 15 north (Main Street) – Downtown Bucksport, Bangor||Western terminus of SR 15 concurrency|
|Orland||64.0||103.0||SR 46 (Duck Cove Road) – Dedham, East Holden||Southern terminus of SR 46|
|64.6||104.0||SR 175 (Castine Road) – Orland, Castine||Northern terminus of SR 175|
|67.2||108.1||SR 15 south (Front Ridge Road) – Penobscot, Blue Hill, Deer Isle||Eastern terminus of SR 15 concurrency|
|71.4||114.9||SR 176 (Surry Road) – Surry||Northern terminus of SR 176|
|Ellsworth||81.7||131.5||SR 172 (West Main Street) – Blue Hill, Surry||Northern terminus of SR 172|
|82.0||132.0||SR 230 (Water Street)||Northern terminus of SR 230|
|82.2||132.3||US 1A (Oak Street) – Bangor||Southern terminus of US 1A|
|83.2||133.9||US 1 north – Calais||Northern terminus of US 1 concurrency|
|Trenton||86.8||139.7||SR 204 (Jordan River Road) – Lamoine||Western terminus of SR 204|
|90.4||145.5||SR 230 (Oak Point Road)||Southern terminus of SR 230|
|Bar Harbor||91.7||147.6||SR 102 / SR 198 (Main Street) – Northeast Harbor, Southwest Harbor||Northern terminus of SR 102 and SR 198|
|102.0||164.2||SR 233 (Eagle Lake Road) – Cadillac Mountain, Southwest Harbor||Eastern terminus of SR 233|
|Mount Desert||113.0||181.9||SR 198 south (Harborside Road) – Northeast Harbor||Southern terminus of SR 198 concurrency|
|118.0||189.9||SR 233 (Eagle Lake Road) – Bar Harbor||Western terminus of SR 233|
|119.21||191.85||SR 102 / SR 198 north (Main Street) – Ellsworth, Somesville, Southwest Harbor||Eastern terminus of SR 3|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Maine State Route Log via floodgap.com
- Adams, Betty (October 29, 2013). "Two new roundabouts at Interstate 95 exit 113 open in north Augusta". Kennebec Journal. Retrieved October 29, 2013.