then followed Williams Avenue north to Main Street, where it turned east. At the eastern city limit of Westville, US-59 turned north, joining its modern-day alignment north of the US-62 junction. With the 1952 realignment, US-59 continued straight through the intersection, bypassing Westville to the west. The next change to US-59 was a realignment between the SH-33 junction in the town of Kansas and downtown Jay. The new highway had several curves straightened, reducing this segment's length from to . This change was approved by the Highway Commission on August 19, 1952. On July 6, 1964, the Oklahoma State Highway Commission approved a realignment to US-59's route through Poteau. Another change, further north, was approved on March 4, 1968. This moved US-59 onto a new bridge over the Arkansas River upon completion of its construction, with the old highway being turned over to the U.S. Army Corps of Engineers. An application for this change was received by the American Association of State Highway Officials (AASHO) on March 26, 1968, and approved by that body on June 18, 1968. The highway commission approved another alteration to US-59 in the Poteau area on February 5, 1973. On that date, the commission approved a realignment of US-59 from a point south of the intersection with US-270 and US-271, to that junction, and on into Poteau. The realignment was submitted to AASHO on April 10 of that year, received on April 13, and approved on June 26. A section of highway north of Jay was straightened on October 7, 1974. Another straightening was approved the following year, this time in the vicinity of Heavener; this change was approved by the highway commission on August 19, 1975, and approved by AASHO, now renamed to , on July 13, 1976. On March 7, 1977, the Oklahoma State Transportation Commission (which had replaced the highway commission) approved another straightening in the Howe area. The realignment was approved by AASHTO on July 7, 1977. The next change to US-59 came on November 2, 1981, when the transportation commission approved moving just over of highway between Flint and West Siloam Springs to the north of the previous alignment. AASHTO approved the realignment on June 29, 1982. A section of highway, south of Stilwell, in Sequoyah and Adair counties, was straightened, shortening the highway by . The transportation commission approved on October 4, 1982. On September 7, 1999, the Oklahoma