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合安高速公路（國高網編號G4212）全長174.1公里，于2002年9月底通車。合安高速公路北(bei)(bei)起合(he)肥繞城高(gao)(gao)速(su)南環段(duan)的(de)(de)小西沖樞(shu)紐(niu)(niu)，南接(jie)安(an)慶(qing)長江大橋后再與(yu)(yu)沿江高(gao)(gao)速(su)公(gong)(gong)(gong)(gong)路(lu)(lu)相接(jie)，其中(zhong)小西沖樞(shu)紐(niu)(niu)至馬堰樞(shu)紐(niu)(niu)段(duan)為(wei)(wei)G3京臺高(gao)(gao)速(su)公(gong)(gong)(gong)(gong)路(lu)(lu)的(de)(de)共(gong)用段(duan)，鴿子墩樞(shu)紐(niu)(niu)至安(an)慶(qing)長江大橋段(duan)為(wei)(wei)G50滬渝(yu)高(gao)(gao)速(su)公(gong)(gong)(gong)(gong)路(lu)(lu)的(de)(de)共(gong)用段(duan)。合(he)安(an)高(gao)(gao)速(su)公(gong)(gong)(gong)(gong)路(lu)(lu)目(mu)前有濱湖新(xin)區、嚴店、舒城、廬江、桐城、懷寧、安(an)慶(qing)北(bei)(bei)、安(an)慶(qing)、大橋、安(an)慶(qing)南收費所和豐樂、陳埠、香鋪、大龍山服務區。合(he)安(an)高(gao)(gao)速(su)公(gong)(gong)(gong)(gong)路(lu)(lu)是華東(dong)地區與(yu)(yu)華中(zhong)、華北(bei)(bei)、華南地區聯(lian)系的(de)(de)主要(yao)陸路(lu)(lu)通(tong)道，也是安(an)徽(hui)省(sheng)南北(bei)(bei)向的(de)(de)重(zhong)(zhong)要(yao)干線(xian)公(gong)(gong)(gong)(gong)路(lu)(lu)。合(he)安(an)高(gao)(gao)速(su)公(gong)(gong)(gong)(gong)路(lu)(lu)在(zai)國(guo)家公(gong)(gong)(gong)(gong)路(lu)(lu)網(wang)中(zhong)具(ju)有重(zhong)(zhong)要(yao)的(de)(de)地理位置，對于國(guo)民經濟發(fa)展具(ju)有十分重(zhong)(zhong)要(yao)的(de)(de)意義。