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43.6
43.6.1
Terms and expres-
sions
43.6.2
Horizontal alignment
686
Understanding Terms and Expressions
Road - Basic Terms
a
j
f
c
i
e
g
h
Road_001
a
Cut situation
b
Fill situation
c
Centreline
d
Natural surface
e
Hinge point
f
Catch point
g
Carriage way
h
Shoulder
i
Slope
j
Top
k
Toe
Term / expression
Carriage way
Shoulder or Verge
Slope
Natural surface or original
ground
Finished road level
Catch point or daylight
point
Chainage or station
Road - Horizontal and Vertical Geometry Elements
The app supports the following elements in the horizontal component of align-
ments:
b
g
c
h
e
k
i
d
Description
The part of the road on which users drive
once the road is finished.
Often located next to the carriage way, usu-
ally with a slightly higher slope ratio than the
carriage way.
Located next to the verge and can be
thought of as linking the road level with the
natural surface. The ratio of the slope is
greater than the ratio of the verge. A slope
starts at the hinge point.
The undisturbed surface before project con-
struction.
Describes the final road surface.
Indicates the point of intersection between
the slope and the natural surface. Both the
hinge point and the catch point lie on the
slope. For a cut slope, the catch point forms
part of the top of a bank. For a fill slope, the
catch point forms part of the bottom of a
bank.
The cumulative distance along the centreline,
frequently but not always starting at zero.
Roads - General
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