IHSDM: Modules

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

• Crash Prediction Module: estimates the expected frequency 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 systematically 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 2012 Release Crash Prediction Module includes capabilities to evaluate rural two-lane highways, rural multilane highways, urban/suburban arterials, and (new for the 2012 Release) freeway segments.The other evaluation modules – are only applicable to rural two-lane highways.

To learn more about the IHSDM modules, click on one of the visuals below.

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
e-mail: clayton.chen@dot.gov