508國道(或「國道508線」、「G508線」),也稱赤峰-曹妃甸公路,是在中國的一條國道,起點為內蒙古自治區赤峰市寧城縣小城子鎮,終點為河北省唐山市曹妃甸曹妃甸港的國道,途經平泉、寬城、青龍、遷安、灤州、唐海、曹妃甸,508國道為《國家公路網規劃》[1]普通國道網182條聯絡線的第8條。
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