Reduce overall cost of ownership, maximize track component life, increase efficiency and effectiveness in track infrastructure maintenance planning with Geotrack™. Geotrack™ is a three-dimensional, multi-layer model for determining the responses of the track and subgrade as a function of:

  • Wheel loads
  • Properties of rails and ties
  • Properties of ballast, sub-ballast and underlying soil layers
  • Dimensions including tie spacing and layer thicknesses

Applicable for any type of vehicle on any type of track, the model can be used to examine the effects of loads on track component performance, rail and tie properties on track performance, and pad stiffness, as well as ballast stiffness on track behavior and performance. It can also be used to examine the effects of track subgrade conditions on track performance, and to conduct ballast depth design and track modulus/stiffness analysis.


The Track Substructure Management System is an interactive tool that provides background information, guidelines, and recommendations for managing localized substructure problems. Most useful for frontline track maintenance personnel, the application covers the substructure basics for substructure design, track drainage, ballast, sub-ballast, subgrade, and track transitions. It provides guidelines such as “how to inspect” and “what to do,” including important warning signs, inspection techniques, troubleshooting, glossary, and summary table. This application is available for use on computers, tablets, or mobile devices.


Analyze and visualize your track and substructure. Our comprehensive software package can increase safety, reliability, and efficiency in your operations and infrastructure.


Model substructure movements. Quantify, analyze, and optimize track substructures to ensure safety and reliability of your infrastructure.


Visualize weaknesses.
Understand and prioritize potential issues before they impact your operations.



Geotrack™ is a software for track structure analysis under vertical quasi-dynamic loads, and was developed by Transportation Technology Center, Inc. DBA MxV Rail and is primarily intended for use on personal computers (PC). It is a three-dimensional elastic multilayer model for the analysis of conventional railway track structures under vertical wheel loadings. The model can analyze up to four superimposed axles. The trackbed layers are treated as linear elastic materials. However, the moduli may be made stress-state-dependent by using an iterative solution scheme. In this case, the problem is solved repeatedly under the full specified loading conditions until the stress-dependent modulus for each layer is consistent with the layer stresses. The user selects the number of iterations, but three to four iterations generally are sufficient to ensure convergence of the soil moduli.



  1. Chang, C. S., C. W. Adegoke, and E. T. Selig (November 1980) Geotrack model for track performance, Journal of the Geotechnical Engineering Segment, ASCE, Vol. 106, No. GT11, pp. 1201-1218.
  2. Alva-Hurtado, J. E. (May 1980) “A methodology to predict the elastic and inelastic behavior of railroad ballast,” Ph.D Dissertation, University of Massachusetts, Department of Civil Engineering, Amherst, MA.
  3. Stewart, H. E. and E. T. Selig (November 1982) “Predicted and measured resilient track response,” Journal of Geotechnical Engineering Segment, ASCE, Vol. 108, No. GT11, pp. 1432-1442.
  4. Stewart, H. E. (May 1982) “The prediction of track performance under dynamic traffic -loading,” Ph.D. Dissertation, University of Massachusetts, Department of Civil Engineering, Amherst, MA.
  5. Thompson, M. R. (December 1977) “FAST® ballast and subgrade materials evaluation,” Ballast and Foundation Materials Research Program, University of Illinois at Urbana-Champaign, for U.S. DOT, FRA, Report No. FRA/ORD-77/32, Washington, D.C.
  6. D. Li, J. Hyslip, T. Sussmann, S. Chrismer (September 2015) Railway Geotechnics, Book, CRC Press


Learn about Geotrack™ for your projects

Installation Instructions

A current license key is necessary to complete the installation. Follow these steps to install the program on your computer (also listed in the readme.txt file).

  • Download the .zip file. If this is a new install, first run the setup.exe prior to plugging in the license hardware dongle. Administrator privileges on the machine will be necessary.
  • Plug in the hardware dongle.
  • If this is an upgrade, you may skip step 1 and install the .msi file.
  • The program will be installed to directory C:\Program Files (x86)\TTCI\Geotrack.


A number of executable files and sample input files will be installed. The install will also create a shortcut on the desktop and Start menu.


Many technical problems invovling the Sentinel keys can be resolved simply by installing the latest system drivers. Please download and install the latest driver below.

This driver update is compatible with Windows 98/ME/NT/2000/XP/Server 2003/2008/Vista & Windows 7/8/10 (32 bit and 64 bit)

Download Sentinel Protection Installer
Sentinel Protection Installer v7.6.0


Installation Troubleshooting
If you are running LabVIEW 2009 or later and are unable to install the Sentinel Driver, make sure LogosXT is running and not the old Logos service.

Disabling the old Logos Service

  • Create a Logos directory on your computer in the following location:
    • For Windows XP:
    • C:\Documents and Settings\All Users\Application Data\National Instruments\Logos
    • For Windows Vista & Win7:
    • C:\ProgramData\National Instruments\Logos
  • In that directory create a text file called
    • Logos.ini

Place the following text in that file: