2.5.1 Bridge Design (BD)...................................................................................................... 21 2.5.2 Cost Estimating (CE) ................................................................................................... 22 2.5.3 Data Analysis & Insights (DAI) .................................................................................... 24 2.5.4 Economic Studies (ES) ............................................................................................... 27 2.5.5 Financial / Commercial (FC) ........................................................................................ 28 2.5.6 Geotechnical Engineering (GE) ................................................................................... 30 2.5.7 Highway Engineering (HE) ............................................................................................................................................................................................................................ 32 2.5.8液压设计（HD）......................................................................................................................................................................... ...........................................................................................................................................................................................................................................................................................................................................交通工程（TE）....................................................................................................................................................................................... .............................................................................................................................................................................................................. 42 2.6具有多个学科的项目.......................................................................................................................................................................................................................................