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    さまざまな年代の道路標識 | |
| 高速道路名 | |
|---|---|
| 州間高速道路 | 州間高速道路nn (I-nn) |
| 米国の高速道路 | 米国ハイウェイ nn (US nn) |
| 州 | アイオワnn |
| システムリンク | |
米国アイオワ州の州道はアイオワ州運輸局が所有し、管理しています。
州道
References
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