Figure1
Figure 1. The RIOHTrack ring road has a total of 19 structures, which include a thin asphalt layer semi-rigid foundation road, a conventional semi-rigid foundation road, a rigid composite road, a flip structure road, a thick asphalt structure road, and a full thickness structure road. Taking the structure of STR 1 as an example, it consists of a 12cm asphalt concrete surface layer, a 40cm cement stabilized graded gravel layer, and a 40cm cement stabilized soil layer[25]
