Interactive Highway Safety Design Model (IHSDM)

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Welcome to the Interactive Highway Safety Design Model (IHSDM) software download web site.

The IHSDM - HSM Predictive Method 2015 Release Update (version 11.1.0; March 11, 2016) is now available free-of-charge. The Update includes a new Crash Modification Factors (CMF) Report, as part of the Crash Prediction Module output. In addition, the 2015 Release Update contains enhancements to the Policy Review Module (PRM), including new policy checks for Bike Lane Width on rural 2-lane highways and Stopping Sight Distance and Decision Sight Distance on rural multilane highways.

See Release Notes for the IHSDM 2015 Release Update and Release Notes for the IHSDM 2015 Release for more details on enhancements. Please note: The IHSDM 2015 Release Update can be installed over 2011 and later versions of IHSDM.

Through this site you can complete the required registration process and, upon approval, download IHSDM. (Existing registered users, follow the “Download Login” link to access this update. New users, click on the “Download Registration” link.)

The IHSDM - HSM Predictive Method 2015 Release Update includes six evaluation modules: Crash Prediction, Policy Review, Design Consistency, Traffic Analysis, Driver/Vehicle and Intersection Review. To the extent possible, the Crash Prediction Module (CPM) faithfully implements Part C (Predictive Method) of AASHTO's 1st Edition Highway Safety Manual for evaluating rural 2-lane highways, rural multilane highways, and urban/suburban arterials, as well as HSM 2014 Supplement materials on freeway segments and freeway ramps/interchanges. For more information on IHSDM, visit FHWA's general IHSDM website.

On October 22, 2015, FHWA hosted a web conference on the IHSDM - HSM Predictive Method 2015 Release. To access a recording of the web conference and presentation slides, visit the IHSDM 2015 Web Conference page.

The web site is organized into the following pages:

You can learn more about the functionality of IHSDM and the IHSDM research and development program at the main IHSDM technology web site.