At this type of intersection, the meeting of the Secondary Road with the Main Road is carried out by constructing two fans with their own alignments, grade lines and standard sections and which behave totally independently. The section of each of the links will inherit the characteristics of the section of the Secondary Road depending on which side it is on.
Upon selecting this option, MDT will initially ask us to designate a point near the intersection to be built and the following window will then appear at which we will enter the parameters required to carry it out.
Main Connection: This dropdown menu will show us the different types of vectors to be found on the Main Road and we must choose the vector as far as which the intersection or expansion will be built. Generally speaking, this vector usually coincides with the Outer Hard Shoulder where there is one.
Intersection Zone: In this section we will define the extension which the intersection to be carried out is to occupy.
· Main (PE1): This distance is measured from the center of the intersection on the right of the Main Road.
· Main (PE2): This distance is measured from the center of the intersection on the left of the Main Road.
· Secondary (SE).: In this case the distance is measured from the center of the intersection to the point on the Secondary Road as far as which the intersection is to be built.
MDT draws some lines on the drawing indicating the surroundings of the intersection in accordance with the parameters stated previously.
Link 1 (B1): Parameters required for the development of Link 1; this link will be situated on the left depending on the direction of travel of the Secondary Road.
Type: We define the alignment which is to connect the Secondary Road to the Main Road in line with the type selected and we will enter the values corresponding to the alignment designated on the lower controls.
There is also the possibility of designating an alignment which we have pre-defined.
Secondary Connection: This dropdown menu will show us the platform vectors of the Secondary Road and we will designate the one on which we wish to start the aforementioned alignment.
Draw Alignment: Preview of the alignment in line with the parameters specified.
Link 2 (B2): Parameters required for the development of Link 2; this link will be situated on the right depending on the direction of travel of the Secondary Road.
Type: We define the alignment which is to connect the Secondary Road to the Main Road in line with the type selected and we will enter the values corresponding to the alignment designated on the lower controls.
There is also the possibility of designating an alignment which we have pre-defined.
Secondary Connection: This dropdown menu will show us the platform vectors of the Secondary Road and we will designate the one on which we wish to start the aforementioned alignment.
Draw Alignment: Preview of the alignment in line with the parameters specified.
Section: This part shows us the values of the cut and fill slopes of the Main Road and the Secondary Road in line with the intersection point with the corresponding link.
The user has the possibility of changing the values of the slopes in line with the characteristics of the intersection.
Discretization Interval: Separation between the vertices for drawing the links,
Draw Link 1: Preview of the final condition of Link 1 in line with the parameters specified.
Draw Link 2: Preview of the final condition of Link 2 in line with the parameters specified.
The image below shows the preview of one of the links before its fusion with the current surface.
Volume: Possibility of showing, once the intersection has been carried out, the cut volume and total fill it affects in line with the earthworks carried out. The volume will be calculated in line with the specified cell size.
Calculate intersection: By pressing this button the two links will be calculated automatically and the new intersection surface will be merged with the current surface, resulting in a new surface.
TcpMDT
