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The stretch of road discussed here is probably
the most unusual in the entire country. OK-20 approaches the Oklahoma/Arkansas State Line from the west. AR-43 approaches from the east. They meet at the state line, roughly five miles south of Missouri, and start heading to the NNW, along the state line, as a duplexed road. (Other web sites say that OK-20/AR-43 is the only road in the country duplexed with SH's from different states, and who am I to argue?) Now here's where it really gets interesting: this duplexed road goes along the state line for about four miles, then turns back into Oklahoma for almost the entire last mile. In the Terraserver satellite picture at left, the state lines are in yellow, the highway in question is in green. The section where the green line is to the left of the yellow line is the part we're talking about here, for in that section Arkansas State Highway 43 is located wholly within the state of Oklahoma! As for why AR-43 just didn't stop back when it reached the border: continuity. Just after the road retouches the OK/AR state line, it crosses into Missouri, where it becomes their SH-43. |
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