Place stations
Place
stations/landmarks and enter elevation
data.
After finishing the horizontal curve alignment, the
stations/landmarks on the horizontal design can thereafter be placed by using
the landmark tool. Currently, the digital contour map consists of no digital
elevation data. Users have to manually place stations/landmarks and elevation
data on existing tangent points, start and end points, and every contour line
that intersects with the road geometry design. Use the station/landmark tool
to locate a station from start (A) to end
(B) point and enter the elevation of the station sequentially. (Warning: if stations/landmarks are not placed
sequentially, the final design and road length will be
incorrect.) After placing all stations and entering corresponding
elevation info, the road geometry design will look similar to Figure 8(b) with
stations/landmarks.
Tips: The stations/landmarks of the road design need to be placed
sequentially from starting station to the last station. Stations should be
placed on all points that contour curve and road curve intersect. Tangent point
of curve and line segment should also be included. When placing a
station/landmark near by a line and a curve, please make sure the selected
location of the station/landmark belongs to the correct line/curve segment in
the elevation data entry window as shown in Figure 8(a) or use the “Check Station Data” option under tool menu to verify the
station data. Select the modify end point tool and use
right mouse click on a tangent point to delete tangent pair point.
8(a) Enter landmark elevation
data
Figure 8(b) Place stations or landmarks with elevation
data
Use “Road Only” option under view
menu bar or Control+Z to display only the horizontal roadway geometric
design as shown in Figure 8(c). Use the “Road Design” option or Control+A to
display the design view including the construction
lines/curves.
Figure 8(c) Display final roadway geometry
only
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