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。合安高速公路北起合肥繞城高(gao)(gao)速(su)(su)(su)南環(huan)段(duan)(duan)(duan)的(de)(de)小西沖樞(shu)(shu)紐(niu)，南接(jie)安(an)(an)(an)(an)慶(qing)(qing)長江(jiang)(jiang)大橋(qiao)后再與(yu)沿江(jiang)(jiang)高(gao)(gao)速(su)(su)(su)公(gong)(gong)(gong)路(lu)相接(jie)，其中小西沖樞(shu)(shu)紐(niu)至(zhi)馬堰樞(shu)(shu)紐(niu)段(duan)(duan)(duan)為(wei)G3京臺高(gao)(gao)速(su)(su)(su)公(gong)(gong)(gong)路(lu)的(de)(de)共用段(duan)(duan)(duan)，鴿(ge)子墩樞(shu)(shu)紐(niu)至(zhi)安(an)(an)(an)(an)慶(qing)(qing)長江(jiang)(jiang)大橋(qiao)段(duan)(duan)(duan)為(wei)G50滬渝高(gao)(gao)速(su)(su)(su)公(gong)(gong)(gong)路(lu)的(de)(de)共用段(duan)(duan)(duan)。合安(an)(an)(an)(an)高(gao)(gao)速(su)(su)(su)公(gong)(gong)(gong)路(lu)目前有(you)濱湖新(xin)區、嚴店、舒城、廬(lu)江(jiang)(jiang)、桐城、懷寧、安(an)(an)(an)(an)慶(qing)(qing)北、安(an)(an)(an)(an)慶(qing)(qing)、大橋(qiao)、安(an)(an)(an)(an)慶(qing)(qing)南收費所和豐樂、陳埠、香鋪、大龍山服務區。合安(an)(an)(an)(an)高(gao)(gao)速(su)(su)(su)公(gong)(gong)(gong)路(lu)是華東地(di)(di)區與(yu)華中、華北、華南地(di)(di)區聯系(xi)的(de)(de)主要陸路(lu)通道，也是安(an)(an)(an)(an)徽省(sheng)南北向的(de)(de)重要干線公(gong)(gong)(gong)路(lu)。合安(an)(an)(an)(an)高(gao)(gao)速(su)(su)(su)公(gong)(gong)(gong)路(lu)在國家公(gong)(gong)(gong)路(lu)網中具(ju)有(you)重要的(de)(de)地(di)(di)理位置，對于(yu)國民經濟發展具(ju)有(you)十分重要的(de)(de)意(yi)義。
