起止桩号:K198+700~K259+806.552,主线全长61.107km,NK0+000-NK1+300大浪沙上跨1.3km,NK0+000-NK1+300隧道处 S303改线1.3km,NK0+000-NK1+100 主线K239处S303支线上跨1.1km,全长64.807km。/r/n全线路面工程:20cm厚天然砂砾底基层1560587.9m2,34cm厚天然砂砾底基层38562.5m2,厚20cm水稳基层36194.4m2,厚32cm水稳基层 22228.21m2,厚36cm水稳基层1342072.2m2,下封层1484324.74m2,70mm粗粒式沥青下面层1451226.34m2,粘层 1450586.34m2,50mm中粒式沥青上面层35547.5m2,50mm中粒式SBS改性沥青上面层1438892.3m2,水泥混凝土路面12753m2,培土路肩112104.6m3,中央隔离带填土64991.7m3,2cm砂粒式沥青混凝土3678.776m3。