FHWA’s Geometric Design Laboratory (GDL) at the Turner-Fairbank Highway Research Center provides technical support free of charge for IHSDM users. The GDL's transportation engineers researched, helped to develop, and tested IHSDM, and they have intimate knowledge of this resource. To request technical support, either telephone the IHSDM Help Line at (202) 493–3407 or send an email to IHSDM.Support@dot.gov.

Training related to IHSDM is offered by FHWA’s Resource Center and through the National Highway Institute (NHI). Click here for details.

The IHSDM Website provides a means to download the software, an overview of IHSDM capabilities, a library of the research underlying IHSDM, and information about training and technical support.  

In-Kyu Lim

Office of Safety Research and Development
Turner-Fairbank Highway Research Center
Federal Highway Administration
6300 Georgetown Pike
McLean, VA 22101

In-Kyu.Lim@dot.gov