Oklahoma State Highway 14 route continued north along present-day U.S. 281 through Alva to the state line south of Hardtner, Kansas. (The old road north of Vici became part of SH-34.) New U.S. routes were added to Oklahoma's highway system in 1938. Among these were US-281, formerly a split route with one section in Kansas and one in Texas, which was connected in 1938 via Oklahoma; also added in 1938 was a southern extension of US-183. These two routes were overlaid onto SH-14, with US-183 entering the state from the south near Davidson and following the SH-14 route to Seiling, and US-281 taking the
South Australian borders technology available in the 1920s. The 127-metre section that runs east–west along the 26° south is part of the border between Western Australia and the Northern Territory. In June 1968, two monuments were erected to mark each end of this 127-metre sideways section, the easternmost of these monuments, being where all three borders meet, was named Surveyor Generals Corner. Cameron Corner is the point in the outback of eastern Australia where the boundary lines of the states of Queensland, South Australia, and New South Wales meet. Haddon Corner is the north-eastern corner of the state of South Australia, where it