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In 2010, the National Highway Traffic Administration (NHTSA) concluded a feasibility study of the Organization for Economic Co-operation and Development data collection protocol for use in the United States. This effort was designed as the precursor to the larger Motorcycle Crash Causation Study...
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Turner-Fairbank Highway Research Center Visitors
Due to increased security measures required at all Federal properties, the Federal...
The objective of the Driver/Vehicle Module is to permit the user to evaluate how a driver would operate a vehicle (e.g., passenger car or tractor-trailer) within the context of a roadway design and to identify whether conditions exist in a given design that could result in loss of vehicle...
The Traffic Analysis Module uses the TWOPAS traffic simulation model to estimate traffic quality-of-service measures for an existing or proposed design under current or projected future traffic flows. The traffic analysis module facilitates use of TWOPAS by feeding it the roadway geometry data...
The Policy Review Module checks roadway-segment design elements for compliance with relevant highway geometric design policies. The module provides electronic files replicating quantitative policy values specified by the American Association of State Highway and Transportation Officials (AASHTO...
The Design Consistency Module (DCM) helps diagnose safety concerns at horizontal curves. Crashes on two-lane rural highways are over-represented at horizontal curves, and speed inconsistencies are a common contributing factor to crashes on curves. This module provides estimates of...
The Crash Prediction Module (CPM) includes an implementation of the crash prediction methods documented in part C of the American Association of State Highway and Transportation Officials’ (AASHTO) First Edition Highway Safety Manual (HSM). CPM includes capabilities to evaluate rural two-lane...
Click the link to download the IHSDM 2021 software release (version 17.0.0; September 2021).
The IHSDM—which supports the Federal Highway Administration's Data-...