roadbed

n.

（铁路的）路基；（道路的）路床；（道路的）车行道；路面

1. The earthquake made the roadbed cave in.
   地震后路基沉陷了。
2. Put up your hands to build a home of the roadbed.
   搭起双手筑成你回家的路基。

A Roadbed Cooling Approach for the Construction of Qinghai-Tibet Railway
Deformation of Highway Roadbed in Permafrost Regions of the Tibetan Plateau
Application of the roadbed cooling approach in Qinghai–Tibet railway engineering
Construction of Qinghai-Tibet Railway with Cooled Roadbed
Numerical studies for the thermal regime of a roadbed with insulation on permafrost
TESTING STUDY ON MODIFICATION OF RAILWAY ROADBED FOR BEIJING-SHANGHAI HIGH-SPEED RAILWAY
RESEARCH ON ENGINEERING GEOLOGY OF THE ROADBED IN PERMAFROST REGIONS OF QINGHAI-XIZANG PLATEAU
Utilization of multimode surface wave dispersion for characterizing roadbed structure
Study on thermal balance of asphalt pavement and roadbed stability in permafrost regions of the Qinghai-Tibet Highway
Studies on numerical manifold method for determination of safe thickness of karst roof in roadbed