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Developer(s) Transoft Solutions Inc.
Initial release 1991
Stable release
AutoTURN 9.1
Operating system Microsoft Windows
Platform Bentley Systems MicroStation / Autodesk AutoCAD
Type CAD
License Proprietary software

AutoTURN is a third-party CAD software released for the AutoCAD, MicroStation or BricsCAD platforms, developed and sold by Transoft Solutions Inc. AutoTURN software can only be used on computers that run Microsoft Windows operating system and is available as a 2D or 3D (Pro) version. Among a number of things, it analyses and simulates swept path vehicle maneuvers.


  • AutoTURN was originally developed for Transoft Solutions Inc. in 1991. AutoTURN was designed as the practical application of a University of Calgary civil engineering graduate studies thesis [1] by Milton Carrasco. The first version of AutoTURN was released for use on Autodesk’s AutoCAD Release 9. In the 25 years since the software was released, it has improved to reflect the needs of engineers and designers in the transportation sector. AutoTURN is used to analyze road and site design projects including intersections, roundabouts, bus terminals, loading bays, parking lots or any on/off-street assignments involving vehicle access checks, clearances, and swept path maneuvers.
  • In 1992, AutoTURN 2.0 was released and was the first released version of AutoTURN compatible with Bentley Systems MicroStation Unix. The libraries of vehicles available for swept path simulation and analysis was limited and vehicle simulations could only be carried out in a forward direction. AutoTURN 2.0 was compatible with AutoCAD Release 10 and then Unix version of MicroStation V 3.4.
  • AutoTURN 3.0 was released in 1993, less than 1 year after AutoTURN 2.0. The 3.0 release version of AutoTURN included many upgrades over its predecessor. This version of AutoTURN included larger vehicle libraries, and a supplement for use with aircraft (This supplement would become expanded into a separate software called AutoTURN Aircraft in 1995). Among other improvements, AutoTURN 3.0 enabled users to run simultaneous simulations of two vehicles in forward and reverse directions in a stop motion (frame by frame) animation. Simulations could only be done from pre-drawn paths.
  • In 2000 the release of AutoTURN 4.0 accounted for international users, it was the first version of AutoTURN available in multiple languages. Among other improvements, AutoTURN 4.0 included expanded international libraries of vehicles. To incorporate the many new capabilities it was necessary to make significant changes to the program’s visual interface and functionality. The change in interface included a new toolbar. Generate simulation tools were introduced so users didn’t first have to draw the vehicle path in order to generate a simulation. AutoTURN 4 introduced the concepts of Active Path and Active Simulation allowing for repetition of various functions without repeated re-selecting of objects. Like the previous release versions, AutoTURN 4.0 contained a supplement for aircraft.
  • AutoTURN 5.0’s release in 2004, among many other functions, introduced Heuristic algorithms for tracking, creation of simulations on spline elements, and improved layer management for simulations. The standard vehicle library file was changed to a searchable database of vehicles based on international or custom standards. Adding to those features AutoTURN 5.1 introduces the ability to set Steering Linkage ratios between the front and rear steering axle groups. Additionally, in the 5.1 version could continuously loop simulations.
  • The 2008 release of AutoTURN 6.0 added additional simulation functions. It builds on version 5.1’s abilities to loop simulations by adding the ability to export simulations to InVision (a separate software application) in order to create video clips. Plan view and chamfered vehicles can be used for simulations and or modified in this version.
  • In 2011, Transoft Solutions added 3D capabilities to the original AutoTURN product. The ability to view clearance issues on the horizontal and vertical planes provides engineers with a more complete picture of their project environments. Transoft engineers conducted several years of research to add the 3D capacity to the back-end code of the software.
  • In April 2014, AutoTURN 9.0 was released to the transportation engineering sector. A version upgrade was released in May 2015.
  • AutoTURN 10 was scheduled to be released in mid Q2 2016.

Release history[edit]

Name Version Date Released Comments
AutoTURN 1.0 1.0 Nov, 1991 Initial release, available for Autodesk’s AutoCAD Release 9
AutoTURN 2.0 2.0 July 1992 First version to run on Bentley Systems’ MicroStation (Unix)
AutoTURN 3.0 3.0 May 1993 First version to include an aircraft supplement
AutoTURN 4.0 4.0 Oct, 2000 Graphical based simulations
AutoTURN 4.1 4.1 Aug, 2002 AutoCAD MDI compliant, 2002, MicroStation V8, Windows 95 98 NT 2000 XP compatible
AutoTURN 4.2 4.2 Jun, 2003 Chinese language support
AutoTURN 5.0 5.0 Nov, 2004 Introduced Heuristic algorithms for tracking
AutoTURN 5.1 5.1 Apr, 2006 Ability to set Steering Linkage ratios between the front and rear steering axle groups
AutoTURN 6.0 6.0 Apr, 2008 Library database search, customizable vehicles, InVision support
AutoTURN 6.1 6.1 Apr, 2009 SQL Express Database engine, AutoCAD 2010 and MicroStation V8i compatibility, Microsoft Window Vista - 64 bit compatibility
AutoTURN 7.0 7.0 Feb, 2010 Specialized transport systems support and complimentary additional functions
AutoTURN 8.0 8.0 Sep, 2011
AutoTURN 8.1 8.1 May, 2012
AutoTURN 8.2 8.2 May, 2013
AutoTURN 9.0 9.0 Jun, 2014 Sight Lines, Path Control, Speed Profile Reports, Vehicle Loads, New Vehicles, Special Transport update, Path Preview, Grading Templates
AutoTURN 9.1 9.1 May, 2015

See also[edit]


  1. ^ CARRASCO, Milton S. E., 1992 : "Archived copy". Archived from the original on 2011-07-06. Retrieved 2008-11-08. . Computerized Vehicle-Turning Simulation: An Interactive Application

External links[edit]