Ramp Segment

You can set ramp segment parameters in the Ramp Segment form whenever you add a ramp or edit the properties of a ramp, or open it from the Road Properties form.

Width

Specify the Width of the ramp segment.

In order to end up with an accessible road, when you set the width, you may need to take into account the Berm width (if Berm access is enabled as part of your design parameters).

Gradient (V/H)

Specify a Gradient rise/run (V/H) value for the ramp segment.

Berm access options

The Toe access width and Crest berm access width options specify how the berms will be accessed from the roads.

Where a berm is accessed by a road you can choose to make the Toe and/or Crest access width the FULL width of the berm, or HALF the width of the berm. You may want to restrict berm access to people, rather than vehicles, for example.

In situations where you do not need to access every berm, you can choose to restrict the access to the Crest or the Toe, or neither, by selecting the ZERO option for one or both to disable berm access to them completely.

If you select CUSTOM for the access width option, you can specify a Fraction value:

Fraction

The Toe access fraction and Crest access fraction options allow you to specify a ratio of the toe/crest access/berm width to apply to the bottom/top of the current road segment.

Taper length

The Toe access taper length and Crest access taper length options can be automatically calculated by leaving the Auto default applied. However, if you want the Toe access or Crest access berms to be tapered at a specific length, enter a value. The length of taper is the distance from the road crossing to the place where the taper starts.

You will receive a warning if the specified taper distance is not appropriate for the pre-defined design parameters. Specifying an inappropriate taper distance may lead to incorrect ramp projections.

Forms

Click the Forms button to select and open a saved form set, or if a form set has been loaded, save the current form set.

OK

Click OK to close the Ramp Segment form and apply any changes you have made to the form.