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inputting the radius, the system will insert an arc with defined
radius in between the former point and the next point. If
inputting parameters A1 and A2 of the spiral, the system will
insert defined spiral between the line and the arc.
[Notes*]: When inputting A1 and A2 according to the
length L1 and L2
of the spiral, the formula to calculate A1 and
A2 are as followed:
Radius
L
A
Radius
L
A
2
2
1
1
Press [ENT] to input the next intersection point after
inputting. If the ‘N’, “E”, “Z” column s are null, the key [ENT]
is invalid. After finishing inputting, press [ESC] to exit, then
enter the interface of “List of H curve”;
Press [View], then you can view the data input and edit
data;
Press [Add], then you can continue alignment. Repeat the
steps above until complete the input.
After complete the horizontal alignment, return to the
“Roadway” menu, if you want to continue alignment, select
“Resume H curve”;
10.1.2 Vertical alignment
Vertical alignment is formed by a group of intersection
points. The intersection points include mileage, altitude and
curve length.
The beginning and ending point of the curve length must be
zero and the number of the intersection points can’t be more than
20 under the vertical alignment.
