TORUS Roundabouts


TORUS® gives you the right tools to design roundabouts smarter and more efficiently. It generates initial geometry honoring reference criteria, and provides real-time feedback regarding recommended dimensional and analytical ranges. Make edits to your design parameters and get instant feedback during the process.

Powered by the trusted AutoTURN® engine, TORUS uses the Vehicle Envelope Method® (U.S. Patent No. 8,650,004) of design to generate roundabout geometry with vehicle swept paths. This innovative approach allows for real-time, interactive designing and dynamically updates any changes made to the entire roundabout layout.

Engineers with all levels of roundabout design experience will find TORUS invaluable during all stages of the design project.



  • New guidelines have been incorporated, such as TAC 2017- Canadian Roundabout Design Guide and NCHRP Report 672.
  • Users can now design mini-roundabouts for when space is limited, to calm traffic, or due to safety/operational reasons.
  • Perform design grading that is more flexible based on the central regions to design tilted planes or even folded planes.
  • TORUS now allows users to grade central regions starting from the exterior (Inscribed Circle Diameter) to the central island.
  • Compatibility with Autodesk® AutoCAD® / Civil 3D® 2018 and Bentley® MicroStation® CONNECT®.


TORUS reduces the amount of time spent developing roundabout design drawings and plans. The software provides a comprehensive solution that allows users to:

  • Focus on engineering designs by eliminating taxing manual calculations, repetitions, and iterations.
  • Manage critical guidelines through active conformity notifications.
  • Be more productive with drafting designs using parametric drafting and dynamic design modeling.
  • Make informed design decisions with real-time safety and performance analysis feedback like fastest path analysis and sight line checking.
TORUS Overview Video
The new TORUS Roundabouts release takes the evolution of this software to another level with new features for designing turbo roundabouts and checking vehicle paths and fastest paths on circular or non-circular roundabouts.
View Video

TORUS Roundabouts Features

Generate roundabout grading with contour lines, crown alignments, and cross slopes to review drainage in 3D. Ensure approach roads enter and exit the roundabout at optimal grades and that the roundabout plateau does not exceed cross slopes affecting vehicle stability. Export grading into LandXML format for vertical CAD platforms. Free-form grade the central island regions to design tilted plane or even folded plane. Users can grade the central regions either from the exterior (Inscribed Circle Diameter) to the interior (Central Island) or from the interior to the exterior.

What Our Clients are Saying

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Platform Compatibility

Platform Requirements
Minimum AutoTURN 8.0, AutoTURN Pro 3D 8.0 or AutoTURN Lite 8.0 (sold separately) installed on the same workstation or network server
Autodesk® AutoCAD® 2010 – 2020 (except AutoCAD LT)
Autodesk® Civil 3D® 2010 – 2020 alignments
Bentley® MicroStation® V8i, CONNECT®
Bentley® AECOsim Building Designer V8i, CONNECT®
Bentley® OpenBuildings Designer CONNECT
Bentley® OpenRoads Designer CONNECT
Bricsys® BricsCAD® (Pro and Platinum) V16 – V17
System Requirements
Full support for 32 and 64-bit operating systems
Workstation: Windows® 7, Windows® 8/8.1, Windows® 10
Network: Windows® Server 2008, 2012, 2016
Languages Available 
English, French, German