More than 6000 installations of our software products world wide show, that DSD is one of the main software developer for accident reconstruction. In addition DSD performs more than 1000 accident reconstructions for court and scientific use. This insight helps for the permanent development of our software programs. Annual updates of PC-Crash ensure actual databases and new simulation models.

Software for the simulation of car accidents

PC-Crash enables the reconstruction and analysis of vehicle accidents and other incidents. More than 6000 installations of the software show that it has become one of the leading tools for traffic accident reconstruction.  Our main users for research, education and reconstruction are accident reconstruction offices, police stations, insurance companies, automotive industry and universities. The included models are validated during the last 20 years by several publications and countless crashtests.

Collisions up to 32 vehicles can be simulated in 2D and also in 3D. Car to car accidents, car to motorcycles , car to pedestrian accidents, occupant movement and also roll over can be calculated.

Several databases of all common cars and motorcycles are included in PC-Crash, special vehicles can be created by the user easily.

The integrated drawing program enables the user to design scene sketches, predefined road objects (2D and 3D) can be loaded.

With the 3D window the user can see the calculations simultanously or by using the onscreen animation. The results can be rendered as animations and saved as AVI files. For a more realistic view, several 3D models are provided with the program.

An online database including several hundreds of true to scale images of cars is available with the new version.



  • Calculation of multiple collisions between several cars
  • 3-dimensional impact model (based on Kudlich-Slibar)
  • Automatic calculation of post collision move­ment until the vehicle's rest position
  • Collision optimizer: Automatic calculation of impact parameters (pre-impact speeds and point of impact loca­tion) using final stop positions. Calculation of bandwidths for the input parameters of the simulation using the „Monte Carlo" optimization algorithm
  • Tolerances for each input parameter can be determined for a given accepted overall trajectory error
  • Impulse model
  • Mesh model: Mesh force/deflection characteristics can be specified and PC Crash determines contact forces and deformations
  • Automatic calculation of primary and secon­dary collisions using default parameters
  • Rollover model

Kinematics - Kinetics:

  • Kinematic module: For fast calculations of pre-impact, impact und post-impact movement, additional modules for velocity-distance-time calculations including avoidance, kinematic pedestrian calculation and overtaking calculations
  • The steering kinematics of buses and vehicles with trailer steering can be specified and are taken into account in the simulation
  • Calculation of distance/time relationship (different diagrams with measurement-capabilities)

Multibody Simulation:

Preprocessor to define and configure multibody systems, the systems can be modified and positioned in a very flexible way.

  • Calculation of occupant movements and loads with the PC-Crash multibody occupant and seat model (belted and unbelted). Interaction with the car interior is taken into account
  • Pedestrian model, the real vehicle shape is used in the calculation. Scaleable pedestrians by anthropometrical data
  • Bicycle and motorcycle models - by specification of joints and friction, fork deformation and spinning wheels can be simulated
  • Multibody systems can be loaded as vehicle surface for calculation of rollover and pedestrian contact




Trailer Simulation:

  • Simulation and impact calculation of truck / trailer combinations (steered trailers, unsteered trailers and semi-trailers can be modeled) using one or multiple trailers
  • Securing load calculation - simulation of belt attachment


With the integrated FE-calculation module, collisions of vehicles against poles or guard rails can be calculated.

  • Calculation of Shells, Solids, Rods with constraints and boundary conditions and different load conditions, contact handling and usage of different materials (elastic, elastoplastic, thermoelastoplastic)
  • Import of Gmsh meshes
  • Multiprocessor support, batch processing is possible
  • Color coded visualization of displacements, stresses and strains





Other Modules:

  • Crash III module for EBS calculations based on the vehicle damage and the NHTSA crash database
  • Tire contact calculation
  • Axle load calculation
  • Securing load calculation
  • Limit method for calculation of pedestrian accidents
  • Sideview window to determine contact locations and contact heights especially for serial collisions
  • active Safety


The simulation results can  be represented in 2D (plan view) and 3D animations, the resulting values ​​are shown on diagrams and text output.

Drawing Program - Bitmaps:

An integrated drawing program enables the creation of accident sketches in 2D and 3D.

  • Elements as intersection, roundabout and roads are included
  • 3D road objects can be created easily
  • 3D drawings can be imported as DirectX, DXF and VRML (*. WRL) format and exported as DXF and VRML files
  • Laser scanner data (asc, xyzrgb format) can be read and edited (also triangulated)
  • Real-time sightlines can be drawn in 2D and 3D view. It is possible to determine the point at which sightlines are unobstructed
  • Traffic lights with adaptive phase plans can be loaded, and displayed in the simulation
  • Multiple bitmaps can be loaded and merged in the 2D view. For png format, the transparency is supported





3D View:

In the 3D window, vehicles and drawing objects are displayed in perspective view, either during the calculation or as onscreen animation. The direction is determined by placing the camera. Bitmaps can be used as ground picture (also on slopes) and as background image.

  • Easy positioning of fixed or variable cameras, the positions can be imported and exported
  • Automatic generation of video animations, which can also be saved as individual images
  • 3D vehicle models for a more realistic representation, and animated objects (pedestrians, horse and rider, animals) are included

Diagrams - Values:

The calculation results are shown in diagrams with measurement capabilities or in the values window.

  • Filter selection (CFC filters) for smoothing curves for time dependent graphs
  • Diagrams can be exported as DXF or as Excel data sheet
  • The text of the values window can be exported in rtf format


In order to integrate the calculation results in a report, several options are available:

  • Simulation protocols and simulation reports can be freely configured
  • A DDE interface to all office applications is available, which can be used to exchange data and results with PC-Crash. Calculation sheets can be designed in any office application and the data fields are filled by PC-Crash
  • Document templates for fast processing of standard accident situations

Hardware Requirements:

PC-Crash is suitable for all Pentium and higher computers, running Microsoft Windows Vista/Windows 7/Windows 8/Windows 10. PC-Crash will run with 32 bit and 64 bit versions of these operating systems.

Processor:  1 GHz IA-32 processor
Memory (RAM):  1 GB
Graphics card:  DirectX 9 graphics processor
HDD free space:  16 GB of free disk space



Software for Scene Rectification


Rect41 01Photographs and videos oblique to a surface are transformated into a plan view like a map. Scanners and digital cameras can be used directly from within the program so the rectification of any kind of picture is possible Distances can be measured true to scale and true to angle. Up to 10 different reference lengths can be used for rectification. All camera parameters (like camera inclina­tion, rotation, focal length and camera height) are calculated in an optimization process using the reference lengths. A drawing program to make road sketches and an accident scene description is included.

  • Rectification of a single picture: All common bitmap formats are supported for import and export of scanned photo­graphs and rectified pictures.
  • Connection of multiple pictures: PC-Rect allows the connection of several pictures using two common points in each picture.
  • Rectification of multiple pictures with measurement grid:
  • Lense distortion: As lenses cause distortion, especially at low focal lengths, errors in the rectification of the image can occur. By using lense correction in PC-Rect, these distortions can be compensated.
  • Luminance calculation: For performing luminance calculation, the camera must be calibrated. By using a camera calibration file image data are converted to luminance and the visibility can be calculated.
  • Panorama generation: Panorama pictures can be created automatically.
  • Video rectification: The video must be divided into individual pictures, which are continously numbered.
    A cut-out has to be selected and reference distances have to be defined.
  • Drawing program: A drawing program to create road sketches and accident scene description, is included.

 Rect42 01  Rect01Rect42 02Rect41 04

Features PC-Crash 12.0:


2D View:

  • Wide tiremark option added 
  • 3D sections are used in 2D view
Foto Mehrfachansicht


3D View:

  • Multiple simultaneous views (mirrors etc.)
  • Background image automatically hidden for camera calibration
  • Faster display rate for large point clouds

Foto Tunnel



  • Import of digital tachograph data files
Foto Tacho1 Foto Tacho2


  • Updated databases
  • Database record data is saved with vehicle 
  • Turning circle is used for max.steering angle


Kinematic Calculations:

  • Throwing distance diagram for bicycle riders added 



  • Contrast and brightness can be modified for point clouds 
  • Support for LAS files added 

Foto Punktwolken


 Multibody simulation:

  • Additional models for motorcycles with detailed wheels 
  • Neew models for Ebikes
  • Simulation of towing rope
  • Spring/damper elements between vehicles can be specified

 Foto Mehrkörpersim


  • Move all vehicles x, y added


  • Updated database (crashtests, images with scales)
  • Finite element calculations added (pole and barrier impacts)


Foto Recondata





Features of PC-Rect 4.2

  • Luminance calculation: Usage of the camera calibration file (Image Engineering) Conversion of image data to luminance Exif information is used automatically Definition of the area of interest Calculation of visibility Luminance difference thresholds according to Adrian SBU diagram Diagram according to DIN 5037
  • Improved functionality in the measurement grid window/method.
  • Panorama generation.
  • Snap function for grid points using pattern recognition.


Rect42 01