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Interactive Highway Safety Design Model (IHSDM): User Group

User Group Purpose

The Federal Highway Administration (FHWA) established the Interactive Highway Safety Design Model (IHSDM) User Group to:

  • Foster communication between IHSDM users within a forum to share their experiences with the software (e.g., success stories/case studies, challenges faced, and solutions) and build support for using IHSDM within an agency.
  • Provide a forum to conduct discussions and presentations on specific IHSDM-related topics.

How do I become a User Group Member?

To become a member of the IHSDM User Group (i.e., to be added to the IHSDM User Group mailing list), please send an e-mail expressing interest to IHSDM Support at

IHSDM User Applications/Case Studies

FHWA seeks to document IHSDM user applications/case studies by posting case study summaries and case study presentations from future IHSDM User Group meetings on the IHSDM website. Please contact IHSDM Support at if you or your agency/organization have used IHSDM for safety analysis or would like to present your project at an IHSDM User Group meeting and/or prepare a project summary for posting on the IHSDM website.

User Group Meetings

December 6, 2023

The December 2023 meeting focused on IHSDM user applications, featuring a presentation by AtkinsRealis staff highlighting their IHSDM Project Applications:

  • Modeling Process Overview.
  • Case Studies: I-285 Eastside Project - Dekalb County, Georgia; I-15 Improvement Project, Las Vegas, Nevada; IH 45 Program, Bryan District, Texas; and FM 917 Schematic Design, Johnson County, Texas.
  • Lessons Learned.

Additional topics included: Review of IHSDM version 17 capabilities; Download and installation of IHSDM version 17; IHSDM website; FHWA’s plans for assisting IHSDM users in applying future Highway Safety Manual second edition (HSM2) Part C Predictive Methods; FHWA’s future plans for IHSDM; Future of IHSDM user group; and Training opportunities.

A recording of the meeting is available here; enter 2*52t?cn as the Passcode when prompted.

June 6, 2022

The June 2022 IHSDM User Group meeting focused on the following presentations highlighting the Wisconsin Department of Transportation’s (WisDOT’s) use of IHSDM:

  • WisDOT and IHSDM (Kevin Scopoline, state traffic safety engineer, WisDOT).
  • Safety Evaluation of the I–894 Freeway Rehabilitation Project (Chris Hager, WisDOT, and Eric Youngblom, HNTB).
  • IHSDM Intersection Example (Kevin Scopoline).

Additional topics included FHWA’s future plans for IHSDM and the IHSDM User Group, IHSDM/Highway Safety Manual training opportunities via the FHWA Resource Center and the National Highway Institute, IHSDM 2021 capabilities, and downloading and installing the software.

Click here to access a recording of the meeting.