Question: Wildsville, Louisiana is located on a US route that was extended to Colorado by what year?

Context paragraphs:
U.S. Route 84: U.S. Route 84 (US 84) is an east–west U.S. Highway.  It started as a short Georgia–Alabama route in the original 1926 scheme, but by 1941 it had been extended all the way to Colorado.  The highway's eastern terminus is a short distance east of Midway, Georgia, at an interchange with Interstate 95.  The road continues toward the nearby Atlantic Ocean as a county road.  Its western terminus is in Pagosa Springs, Colorado, at an intersection with U.S. 160.

U.S. Route 167: U.S. Route 167 runs for 500 mi from Ash Flat, Arkansas at U.S. Route 62/US Route 412 to Abbeville, Louisiana at Louisiana Highway 14.  It goes through the cities of Little Rock, Arkansas, Alexandria, Louisiana, and Lafayette, Louisiana.

Arkansas Highway 52: Highway 52 (AR 52, Ark. 52, and Hwy.  52) is a designation for three state highways in southeast Arkansas.  One route of 7.49 mi runs east from Highway 133 at North Crossett to US Route 82/US Route 425 (US 82/US 425) south of Hamburg.  A second route of 1.83 mi begins at US 82/US 425 south of the other junction and runs east to Ashley County Road 25/County Road 26 (CR 25/CR 26).  A third route of 16.59 mi runs from US 165 in Wilmot east to Highway 159 at Indian.

Pennsylvania Route 978: Pennsylvania Route 978, also known as PA 978, is a 9.7 mi north–south state highway located in western Allegheny County, Pennsylvania.  The southern terminus of the route is at Pennsylvania Route 50 in the vicinity of the Cecil area (of Washington County, although the road remains in Allegheny County) and of the Gladden area.  The highway heads slightly to the northwest, and reaches the northern terminus at the intersection of US Route 22 and US Route 30 in the Imperial-Enlow area.  (A few other names for US 22 and 30 here are William Penn Highway, Lincoln Highway, and Penn-Lincoln Parkway [here not part of I-376].)

Interstate 630: Interstate 630 (abbreviated I-630) in Arkansas is an east–west connector within Little Rock.  It is also known as the Wilbur D. Mills Freeway and starts at Interstate 30/US Route 65/US Route 67/US Route 167 (I-430/US 65/US 67/US 167) traveling west through downtown Little Rock to Interstate 430 and an at-grade intersection with Shackleford Road and Financial Centre Parkway.

Arkansas Highway 147: Highway 147 (AR 147, Ark. 147, and Hwy.  147) is a north–south state highway in Crittenden County, Arkansas.  The route of 25.83 mi runs from Highway 131 at Bruins north across Interstate 40/US Route 63/US Route 79 (I-40/US 63/US 70/US 79) to US 64 near West Memphis.  A portion of the route make up the western routing of the Great River Road.

Arkansas Highway 101: Highway 101 (AR 101, Ark. 101, and Hwy.  101) is a designation for two north–south state highways in north central Arkansas.  A western route of 11.17 mi runs north from US Route 62/US Route 412 (US 62/US 412) to Missouri Route 101 at the Missouri state line.  A second route of 7.13 mi begins at Hand Valley and runs north to US 62/US 412.

Arkansas Highway 223: Arkansas Highway 223 (AR 223, Hwy.  223) is a north–south state highway in north Arkansas.  The route of 29.92 mi runs from Highway 56 in Calico Rock north across US Route 62/US Route 412 (US 62/US 412) to Missouri Supplemental Route E (SSR-E) at the Missouri state line.

Wildsville, Louisiana: Wildsville is an unincorporated community in Concordia Parish, Louisiana, United States.  The community is located on U.S. Route 84 2 mi east of Jonesville.  Wildsville had a post office until May 13, 1995; it still has its own ZIP code, 71377.

Arkansas Highway 126: Highway 126 (AR 126, Ark. 126, and Hwy.  126) is a designation for two north–south state highways in Baxter County, Arkansas.  A southern route of 11.66 mi runs from Buffalo City north to US Route 62/US Route 412 (US 62/US 412) near Mountain Home.  A second route of 7.03 mi begins at US 62/US 412 in Gassville and runs north to Highway 5/Highway 178 at Midway.

Supporting paragraphs: Wildsville, Louisiana U.S. Route 84
Answer: 1941