21
Design Elements
General Guide to RoadPlus - 4.0.0en
Station Ahead y+yyy = Station Back x+xxx
Station Ahead y+yyy = Station Back x+xxx
0+348.832
Station Ahead = 0+550.725
0+619.254
Station Ahead 0+550.725
= Station Back 0+450.725
Station Back = 0+450.725
0+348.832
0+619.254
0+348.832
0+450.725 old
0+348.832
0+460.000 old
0+470.000 old
0+550.725 old
Station Ahead 0+450.725 old
= Station Back 0+550.725 new
0+450.725 new
0+460.000 new
0+470.000 new
0+560.000 new = 0+460.000 old
0+570.000 new = 0+470.000 old
0+650.725 new = 0+550.725 old
Due to removing a constituing element, the sequence of
stationing misses some values. If this is the case, a
gap
equation
(forward station equation) is required. The station
equation is of the form:
The stations between 0+450.725 and 0+550.725 will be
ignored.
Where the sequence of stationing repeats some values after
inserting a design element, we speak of an
overlap equation
(backward station equation). Then, the equation is of the
form:
Stations between 0+450.725 and 0+550.725 exist twice and
require re-organizing.
