Applications
FlexLine, 175
9.13.2
Basic Terms
Elements of a road
project
Road projects consist, in general, of a horizontal and a vertical alignment.
Any project point P1 has E, N and H coordinates
in a determined coordinate system and has
three positions.
P1 ' Position on natural surface
P1 " Position on vertical alignment
P1 '" Position on horizontal alignment
With a second point P2 the alignment is defined.
P1 ' P2 '
Projection of the alignment onto
the natural surface.
P1 '' P2 ''
Vertical alignment
P1 ''' P2 ''' Horizontal alignment
α
Grade angle between the vertical
and horizontal alignment.
a
Natural surface
b
Horizontal alignment
c
Vertical alignment
TSOX_108
P1’
P1’’’
P2’
P2’’
a b c
P2’’’
P1’’
