Unifying Alabama's Traffic Safety Efforts
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The Interactive Highway Safety Design Model (IHSDM) is a suite of software analysis tools for evaluating safety and operational effects of geometric design decisions on highways.

IHSDM is a decision-support tool. It provides estimates of a highway design's expected safety and operational performance and checks existing or proposed highway designs against relevant design policy values. IHSDM results support decision making in the highway design process. Intended users include highway project managers, designers, and traffic and safety reviewers in State and local highway agencies and engineering consulting firms.

The Highway Safety Manual (HSM) introduces a science-based technical approach that takes theguesswork out of safety analysis. The HSM provides tools to conduct quantitative safety analyses, allowing for safety to be quantitatively evaluated alongside other transportation performance measures such as traffic operations, environmental impacts, and construction costs.

For more information about IHSDM, Click Here. For more information about HMS, Click Here.
HSIP and CMF Web-Based Courses
NHI is hosting several HSIP and CMF web-based courses over the next couple of months. Course registration is NOW OPEN via the NHI website for the courses and dates shown below. Please note that the dates below refer to the date of the first instructor-led web conference session. There may be web-based (self-paced) modules to complete prior to this date. Refer to the individual course details page and registration confirmation for additional information.

Highway Safety Improvement Program Overview (FHWA-NHI-380110)

Highway Safety Improvement Program Project Identification (FHWA-NHI-380111)

Highway Safety Improvement Program Project Evaluation (FHWA-NHI-380112)

Strategic Highway Safety Plan Development (FHWA-NHI-380113)

Application of Crash Modification Factors (FHWA-NHI-380093)

Science of Crash Modification Factors (FHWA-NHI-380094)

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Alabama is in the process of a project to study the best approaches for implementing IHSDM/HSM/SA in Alabama. The objective of the project is to develop a plan of action and schedule that includes a scope of work to optimize the implementation of the AASHTO HSM methodologies and the Federal Highway Administration’s (FHWA) supporting software Safety Analyst (SA) and the Interactive Highway Safety Design Model (IHSDM). For more information on this project, see the link to Scoping Study for Implementation of the Highway Safety Manual.