宜蘭縣鄉道在1961年始有編制存在[參 1],今日系統於1983年大致定型[參 2],2002年時又刪減了數條鄉道,目前共計71[參 3]。全縣各鄉鎮內均有鄉道分佈。蘭陽溪周遭平原常見棋盤狀之道路模式,故有多條鄉道呈近乎直角角度相交。[參 4]大部分鄉道分佈於蘭陽平原內,少數幾條位於南澳鄉南澳溪沖積平原上,亦有少數如宜1線宜33線宜51線等深入山區的鄉道。[參 4]

參考資料

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