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