U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


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Federal Highway Administration Research and Technology
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Interactive Highway Safety Design Model (IHSDM): Modules

 

The IHSDM suite of software analysis tools includes six evaluation modules:

  • Crash Prediction Module: Estimates the expected frequency of crashes on a highway using geometric design and traffic characteristics.
  • Design Consistency Module: Estimates the magnitude of potential speed inconsistencies to help identify and diagnose safety concerns at horizontal curves.
  • Intersection Review Module: Performs a diagnostic review to evaluate an intersection design for typical safety concerns.
  • Policy Review Module: Checks highway segment design elements relative to design policy.
  • Traffic Analysis Module: Estimates operational quality-of-service measures for a highway under current or projected future traffic flows.
  • Driver/Vehicle Module: Estimates a driver’s speed and path along a highway and corresponding measures of vehicle dynamics.

 

The IHSDM – HSM Predictive Method 2013 Release Crash Prediction Module includes capabilities to evaluate rural two-lane highways, rural multilane highways, urban/suburban arterials, freeway segments, and (new for the 2013 Release) freeway ramps/interchanges (including ramps, collector-distributor (C-D) roads, and ramp terminals). The other evaluation modules are only applicable to rural two-lane highways.

For additional information contact:

Shyuan-Ren (Clayton) Chen
Office of Safety Research & Development (HRDS)
Turner-Fairbank Highway Research Center
Federal Highway Administration
6300 Georgetown Pike
McLean, VA 22101
clayton.chen@dot.gov

Go to the Crash Prediction Module. Go to the Traffic Analysis Module. Go to the Policy Review Module. Go to the Driver/Vehicle Module. Go to the Design Consistency Module. Go to the Intersection Diagnostic Review Module.

 

Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101