Road and Railway Design

Road/Railway design relies on the robustness of road/railway geometrical computation with four major design elements:

  • Alignment: The position of the center line of the road, highway or railway on the ground.
  • Roadway/Railway: Also called alignment surface. This is the strip of land over which a road/railway passes. It can also be the part of a bridge used by vehicles. In the context of road/railway design, it designates the surface created from the alignment and superelevation. This is the input data for the road/railway design.
  • Terrain: In most cases, an alignment surface is associated to a terrain. It can be an open mesh (surface) or a slab of terrain (volume).
  • Typical cross section: A road/railway cross section is the result of the intersection between a plane (usually normal to alignment) and the road/railway whereas a typical cross section is a profile that is swept (scanned) along both sides of the road or along the railway to modify the terrain, and generate excavations and fillings. A typical cross section is an input for road/railway design, and is represented by a specified sketch.


In this section:

Creating a Road Surface
Creating a Railway Surface
About Typical Cross Section
About Association of Cross Section to Object Type
Creating Typical Cross Sections
Creating a Stretch Set
Creating a Linear Stretch
Creating or Splitting the Subgrade Layer of an Infrastructure
Creating or Splitting a Road/Railway Earthwork