"Road design parameter file" means that you can first input the parameters of each section of this road into this file, and then the software will automatically call the design parameters in this file when calculating the earthwork, so you don't have to change the sections one by one.

For example, a road design parameter file "ZHD.txt" in the \ CASS50 \ DEMO folder is as follows.

1，H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

2，H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

3、H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

4、H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

5，H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

6、H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

7、H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

8，H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

9，H=89，I= 1: 1，W= 10，A=0.02，WG= 1.5，HG=0.5

end

Among them, the serial number of each row is the serial number of the section, and it can be seen that there are 9 sections. In each row, H= represents the design elevation of the road cross section, I= represents the cross slope ratio on the left and right sides of the cross section, W= represents the design width of the road, A= represents the design cross slope ratio of the road, WG= represents the trench width on both sides of the road, and HG represents the trench height on both sides of the road.