Question: Doloroso, Mississippi rests on the US highway that runs for how many miles?
Context: US Highway 12 (US 12) is an east–west US Highway that runs from Aberdeen, Washington, to Detroit, Michigan.  In Michigan it runs for 210 mi between New Buffalo and Detroit as a state trunkline highway and Pure Michigan Byway.  On its western end, the highway is mostly a two-lane road that runs through the southern tier of counties roughly parallel to the Indiana state line.  It forms part of the Niles Bypass, a four-lane expressway south of Niles in the southwestern part of the state, and it runs concurrently with the Interstate 94 (I-94) freeway around the south side of Ypsilanti in the southeastern.  In between Coldwater and the Ann Arbor area, the highway angles northeasterly and passes the Michigan International Speedway.  East of Ypsilanti, US 12 follows a divided highway routing on Michigan Avenue into Detroit, where it terminates at an intersection with Cass Avenue. There are currently eight business routes of Interstate 94 (I-94) in the US state of Michigan.  These business routes connect I-94 to the downtown business districts of neighboring cities.  These eight routes are all business loops which bear the Business Loop I-94 (BL I-94) designation.  These loops are former routings of I-94's two predecessors in Michigan: US Highway 12 (US 12) or US 25.  The westernmost BL I-94 runs through the twin cities of Benton Harbor and St. Joseph along the former routing of US 12 and US 31/US 33 that now includes a section of the Lake Michigan Circle Tour in the state.  The loops in Kalamazoo, Battle Creek, Marshall, Albion, and Jackson were also formerly segments of US 12 which were later designated as separate version of Business US Highway 12 (Bus.  US 12) through their respective cities before becoming BL I-94s in 1960.  The route of the business loop through Ann Arbor was previously US 12 and then later M-14 before receiving its current moniker.  The BL I-94 through Port Huron was previously US 25 and then Business US Highway 25 (Bus.  US 25). North Carolina Highway 42 (NC 42) is a 223 mi state highway and a semi-urban traffic artery connecting Asheboro, Sanford, Clayton, Wilson and Ahoskie as well as many small to medium-sized towns throughout Central and Eastern North Carolina.  The highway is primarily rural, avoiding larger cities such as Raleigh.  NC 42 begins at Interstate 73 (I-73)/I-74/US Highway 220 (US 220) on the western side of Asheboro.  From there the highway runs southeast toward Sanford.  Running through the heart of Sanford, NC 42 intersects several major highways such as US 1 and US 421.  Leaving Sanford the highway runs along the southern side of the Triangle Area, while servicing the smaller towns of Fuquay-Varina and Clayton.  Further east the highway intersects both I-95 and US 264, shortly before entering into central Wilson.  Leaving Wilson the highway continues to the northeast, and intersects US 258 near Crisp.  North of intersecting US 64, NC 42 begins a concurrency with NC 11 from Hassell to western Ahoskie.  Nearing Ahoskie the highway turns to the east and runs south of the center of the town.  NC 42 follows concurrently with US 13 southeast to Powellville.  Nearing its eastern terminus the highway turns east along its own routing until reaching NC 45 in Colerain where the highway ends. There are three business routes of US Highway 10 in the state of Michigan.  They serve as connections from the main highway into Reed City, Clare and Midland.  Additionally, there were another two business routes that connected US Highway 10 (US 10) to the downtowns of Flint and Pontiac.  All of these business routes are, or were, former sections of US 10 that were marked Business US Highway 10 (Bus.  US 10) after the main highway was realigned to bypass the downtowns of the cities. Highway 127 (AR 127, Ark. 127, and Hwy.  127) is a designation for four state highways in Northwest Arkansas.  One route of 4.13 mi begins at Madison County Road 3345 (CR 3345) and runs northwest to Highway 23 at Aurora.  A second route of 4.86 mi begins at US Highway 412 (US 412) at Old Alabam and runs north to Highway 23 at Forum.  A third route of 8.58 mi begins at Highway 12 and runs north to Highway 12 near Clifty.  A fourth route of 5.82 mi begins at Lost Bridge Village and runs north to US Highway 62 in Garfield.  Highway 127 Spur is a spur route of 0.25 mi near the southern terminus of the Lost Bridge Village route that provides access to Lost Bridge Marina.  All routes are maintained by the Arkansas State Highway and Transportation Department (AHTD). Highway 5 (AR 5, Ark. 5, and Hwy.  5) is a designation for three state highways in Arkansas.  The southern segment of 44.99 mi runs from Highway 7 in Hot Springs north to US Highway 70 (US 70) in Little Rock.  A northern segment of 146.63 mi begins at US Highway 67/US Highway 167 in Cabot and runs north to Missouri Route 5, including a lengthy overlap with Highway 25 between Heber Springs and Wolf Bayou.  A portion of Highway 5 is designated as part of the Sylamore Scenic Byway. Highway 169 (AR 169, Ark. 169, and Hwy.  169) is a designation for three state highways in Southeast Arkansas.  One route of 7.82 mi begins at Sulphur Springs and runs northeast to Hancock Road in Crossett.  A second route of 1.27 mi in McGehee begins at Highway 4 and runs east to US Highway 65/US Highway 165 (US 65/US 165).  A third route of 2.21 mi begins at US 165 and runs east to Arkansas Post.  All routes are maintained by the Arkansas Department of Transportation (ArDOT). U.S. Route 61 (US 61) is the official designation for a United States highway that runs 1400 mi between New Orleans, Louisiana, and the city of Wyoming, Minnesota.  The highway generally follows the course of the Mississippi River, and is designated the Great River Road for much of its route.  As of 2004, the highway's northern terminus in Wyoming, Minnesota, is at an intersection with Interstate 35 (I-35).  Until 1991, the highway extended north on what is now Minnesota State Highway 61 (MN 61) through Duluth to the Canada–US border near Grand Portage.  Its southern terminus in New Orleans, Louisiana, is at an intersection with Tulane Avenue at South Broad Street.  The highway is often called the Blues Highway because it connects Saint Paul, Minnesota; St. Louis, Missouri; Memphis, Tennessee; the Mississippi Delta, and New Orleans. Doloroso is an unincorporated community in Wilkinson County, Mississippi, United States near the county seat Woodville and the Homochitto National Forest.  The community rests on U.S. Route 61. Highway 171 (AR 171, Ark. 171, and Hwy.  171) is a designation for three state highways in Southwest Arkansas.  One route of 1.2 mi runs from US Highway 67 (US 67) to Wine Dot Road near an industrial facility.  A second route of 12.9 mi begins at Highway 84 in Malvern and runs east to Lake Catherine State Park.  A third route of 4.91 mi begins at US Highway 270 (US 270) and runs north, with state maintenance ending at Tigre Mountain Road.  All routes are maintained by the Arkansas State Highway and Transportation Department (AHTD).
Answer: 1400 mi