The IHSDM Library includes all recently published materials on IHSDM in online and/or hard copy format. Past published materials, denoted as archive, are also available; these materials are somewhat dated, but may still contain information of interest to serious researchers. Some publications are available only for purchase from the National Technical Information Service (NTIS).

Please Note:

Many of the online documents are in Adobe Portable Document (PDF) File format, which requires a free Adobe Acrobat Reader.

IHSDM Overview

• FHWA’s Future Plans for the Interactive Highway Safety Design Model (IHSDM) (FHWA-HRT-23-017)
• Safer Roads Through Better Design: Using the Interactive Highway Safety Design Model (FHWA-SA-17-011)
• IHSDM Resource List - December 2021
• IHSDM-Related "Safety Data Case Studies" and IHSDM 2021 Capabilities

Archive:

• "Making Two-Lane Roads Safer," Public Roads, January/February 2003.
• IHSDM Preview CD-ROM 
  Version 2.0, FHWA-SA-03-005, September 2003.
  Hard copies are available free of charge by emailing Report.Center@dot.gov.
• Conceptual Plan for an Interactive Highway Safety Design Model
  FHWA-RD-93-122, February 1994.
  Hard copies available only from the NTIS website.

IHSDM Crash Prediction Module

• "Intersection Crash Prediction Methods for the Highway Safety Manual," NCHRP Project 17-68, NCHRP Web-Only Document 297, 2021.
• "Development of Roundabout Crash Prediction Models and Methods," NCHRP Project 17-70, NSCHRP Research Report 888, 2019.
• "Safety Prediction Models for Six-Lane and One-Way Urban and Suburban Arterials," NCHRP Project 17-58, completed 2017.
• Safety Prediction Methodology and Analysis Tool for Freeways and Interchanges, NCHRP Project 17-45 Final Report, May 2012.
• “Methodology to Predict the Safety Performance of Urban and Suburban Arterials,” NCHRP Project 17-26, NCHRP Web-Only Document 129, Phases I and II, 2008.
• “Pedestrian Safety Prediction Methodology,” NCHRP Project 17-26, NCHRP Web-Only Document 129, Phase III, 2008.
• “Methodology to Predict the Safety Performance of Rural Multilane Highways,” NCHRP Project 17-29, NCHRP Web-Only Document 126, 2008.
• "Validation of Accident Models for Intersections, FHWA-RD-03-037, May 2005.
• Prediction of the Expected Safety Performance of Rural Two-Lane Highways
  FHWA-RD-99-207, December 2000.
  Hard copies available only for purchase from the NTIS website.
• Safety Effectiveness of Intersection Left- and Right-Turn Lanes
  FHWA-RD-02-089. 
  Hard copies available free of charge by emailing Report.Center@dot.gov.
• Statistical Model of At-Grade Intersection Accidents - Addendum,
  FHWA-RD-99-094, March 2000.
  Hard copies available only for purchase from the NTIS website.
• Crash Models for Rural Intersections
  FHWA-RD-99-128, October 1999.
  Hard copies available only for purchase from the NTIS website.
• Accident Models for Two-Lane Rural Roads: Segments and Intersections
  FHWA-RD-98-133, October 1998.
  Hard copies available free-of-charge by e-mailing Report.Center@dot.gov.

Archive:

"Workshop on Development of the Interactive Highway Safety Design Model Accident Analysis Module,"
FHWA-RD-96-075, February 1997.
Hard copies available free-of-charge by e-mailing Report.Center@dot.gov.

IHSDM Design Consistency Module

• Evaluation of Design Consistency Methods for Two-Lane Rural Highways, Executive Summary
  FHWA-RD-99-173, August 2000.
  Hard copies available only for purchase from the NTIS website.
• Alternative Design Consistency Rating Methods for Two-Lane Rural Highways, Final Report
  FHWA-RD-99-172, August 2000.
  Hard copies available only for purchase from the NTIS website.
• Speed Prediction for Two-Lane Rural Highways, Final Report
  FHWA-RD-99-171, August 2000.
  Hard copies available only for purchase from the NTIS website.
• Evaluation of Design Consistency Methods for Two-Lane Rural Highways, Technical Summary
  FHWA-RD-99-174, November 1999.
• Interactive Highway Safety Design Model: Design Consistency Module
  Public Roads, September/October 1997.

Archive:

Horizontal Alignment Design Consistency for Rural Two-Lane Highways
FHWA-RD-94-034, January 1995.
Hard copies available only for purchase from the NTIS website.

IHSDM Driver/Vehicle Module

• Development of a Driver Vehicle Module for the Interactive Highway Safety Design Model, FHWA-HRT-08-019, November 2007
• The Capability and Enhancement of VDANL and TWOPAS for Analyzing Vehicle Performance on Upgrades and Downgrades Within IHSDM (PDF - 139 KB)
  FHWA-RD-00-078, August 2000.
  Hard copies available only for purchase from the NTIS website.
• Applying Vehicle Dynamics Analysis and Visualization to Roadway and Roadside Studies 
  FHWA-RD-98-030, November 1998.
  Hard copies available only for purchase from the NTIS website.

IHSDM Traffic Analysis Module

• The Capability and Enhancement of VDANL and TWOPAS for Analyzing Vehicle Performance on Upgrades and Downgrades Within IHSDM
  FHWA-RD-00-078, August 2000.
  Hard copies available only for purchase from the NTIS website.
• "National Cooperative Highway Research Project (NCHRP) #3-55(3) Capacity and Quality of Service of Two-Lane Highways - Task 6 Enhance, Calibrate, and Validate the Selected Simulation Model - TWOPAS Model Improvements", July 1998

IHSDM Intersection Review Module

• IHSDM Intersection Diagnostic Review Model
  FHWA-RD-02-045, March 2003.
• Knowledge Acquisition Methods for the IHSDM Diagnostic Review Expert System
  FHWA-RD-97-134, December 1997.
  Hard copies available free-of-charge by e-mailing Report.Center@dot.gov.