In roadway design situations involving varying pavement widths, the
only effective way to control the edge of pavement positions is through
the use
of
Assign Template Point Centerline. This command assigns centerline
(.CL)
files to template ID points, independent of the main centerline,
thereby controlling the horizontal location of the edge of
pavement. The assignment of Template ID points to centerline
files (.CL) is stored in Template Point Centerline files (.TPC).
These files are then used
by the Process Road Design and Road Network commands.
The slope to these template points
is based on the parameters defined in Design Template.
Subgrades
can be made to follow template IDs if their offset distances are
defined
not by distance but by reference to the template ID.
First you are prompted to create a new Template Point Centerline
file (.TPC), or edit an exisitng one.
Next the Define Template Alignments dialog is presented, showing a
list of
exisitng Template ID-Centerline assignments. To
add a new assignment, first pick the Set button to set the Reference
Template file (.TPL), then pick the Add button. This brings up the
Template Point Centerline Settings dialog. First, pick a Template
Point Description from the List, which is derived from the components
defined in the Template. Next, pick the Specify Centerline File
button, to choose the file (.CL) to assign to the Template Point
ID. Finally, specify if this assignment is for the Left or Right
side of the main centerline. Pick OK. Back in the Define
Template Alignments dialog, pick Add to add another assignment, Edit to
edit an existing assignment, Delete to delete a defined assignment, or
Save to Exit.
Now Process the road design emplying the newly defined Template
Point Centerline assignment. This is the Process Road Design main
dialog. Pick the Template Pt Centerline button to select the new
file (.TPC). You could also create a new Template Point
Centerline file directly from this dialog box.
Pick OK to Process the road design.
Here are two sections along the roadway, illustrating the varying
lane widths on the right side of the main centerline. They are
viewed with the Input-Edit Section
File command on the Section menu.
Pulldown Menu Location: Roads
Keyboard Command: tpcset
Prerequisite: Template file (.TPL), secondary Centerline file(s)
(.CL)
File Name: \lsp\eworks.arx