The 12d Model Highway Design training course will equip you with powerful productivity techniques and tools to use Speed Tables to apply curve widening and superelevation, without the need for complicated MTF modifiers.

12d Model Highway Design Using Speed Tables

A half day course covering the use of Speed Tables in 12d Model to apply curve widening and superelevation, without the need for complicated MTF modifiers.

Prerequisites: Completion of the EXDS Introduction to 12d Model and Basic Civil Design courses, or a good working knowledge of 12d Model. By booking a course, you affirm that you meet the requirements for 12d Model training coursesCheck on upcoming courses at bottom of page.

In this course you will learn the process for applying superelevation and widening to a road using Speed Tables.  You will also cover the techniques used to create and edit the Speed Tables, and to manually override the values set by the table.

Course Outline

  • Apply a design speed to an existing Super Alignment string, and have 12d Model calculate the required curve radaii, plan transition lengths, superelevation, and widening.
  • Override the Design Speed at two of the corners so that they are designed to a lower speed.
  • Review the superelevation that 12d Model has generated.
  • Design the Vertical Geometry for the Super Alignment, and have 12d Model create the vertical curves.
  • Edit the design parameters so that 12d Model uses the smallest possible curve for the HG (default is the longest curve that will fit between IPs.
  • Create a Custom Design for one of the horizontal curves, where you choose the radius, transition lengths and superelevation, and superelevation development length (run-on).
  • Nominate the road strings that will be superelevated (carriageway edge and shoulder) and inspect the road cross sections.
  • Review the structure of the Design Tables that are provided by 12d Solutions and by EXDS.  Note the parameters used for different standards (RMS Design and Austroads).