along with US-270, at I-40 milemarker 181. It continues along with US-270 and 177 through the west side of Shawnee, and continues south of that city until Tecumseh, where US-270 splits off. South of Asher, Oklahoma, SH-3W leaves US-177 and veers southeast toward Ada. SH-3E, the longer of the two split routes, was the original routing of Highway 3 before the two highways were split. It remains on I-40 for after SH-3W splits off. When it does split off, it soon joins SH-18. It follows a route closer to the center of Shawnee. After leaving Shawnee, it heads southeast toward Seminole. Here, it meets US-377/SH-99. SH-3E merges onto this highway, and they will remain concurrent until after they reach Ada. In Ada, SH-3E and SH-3W are reunited and become SH-3 once again. Ada to Atoka SH-3 then becomes part of the Richardson Loop, a freeway around the west and south sides of Ada. Throughout the Richardson Loop, it overlaps SH-1 and US-377/SH-99 at different times. The highway then becomes two-lane once again and heads southeast to the town of Coalgate, where begins an concurrency with U.S. Highway 75, lasting through Atoka. In Atoka, US-75 splits off to join U.S. Highway 69. Antlers to Arkansas Two miles west of Antlers, the highway has an interchange with the Indian Nation Turnpike, and in Antlers it intersects U.S. Highway 271. After reaching the town of Broken Bow, Oklahoma, it turns southward and overlaps US-259 and US-70. Near Idabel, the highway splits off after being with US-259 for . Twenty-eight miles later, it becomes Highway 32 as it crosses the state line into Arkansas. History The current SH-3 was designated on 15 May 1939. The original highway included all of current SH-3 up to Antlers, where it terminated at US-271. It was extended to the Arkansas state line on 4 August 1952. SH-3 ended there concurrent with US-70 and SH-7, near DeQueen, Arkansas. On 7 January 1963, the highway was given its own alignment from near Idabel to Arkansas, taking over that of SH-21, which was eliminated at that time. From the highway's commissioning to 1976, there was only one fork of SH-3 between Shawnee and Ada, which was the path of current SH-3E. SH-3W and SH-3E were created on 4 October 1976; the new SH-3W took over all of SH-13. Other than minor realignments, the highway remains essentially the same today. In the