• September 9th, 2017

A product of the Federal Highway Administration’s (FHWA) Safety Research and Development Program, the Interactive Highway Safety Design Model (IHSDM) is a suite of safety analysis tools to evaluate the safety and operational effects of geometric-design decisions on highways.

  • August 3rd, 2017

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 […]

  • July 9th, 2012

Since the 1950s transportation professionals have been able to quantitatively assess project alternatives based on mobility, and more recently in terms of environmental impact. Limited means have existed to assess the safety performance of different design alternatives. To help address that gap, the Highway Safety Manual (HSM) was published by the American Association of State Highway Transportation Officials (AASHTO), culminating ten years of research and development […]

  • June 18th, 2012

The Florida Department of Transportation has released a report that examines efforts to employ SafetyAnalyst, a new tool that may help states determine system-wide safety-based design decisions by incorporating steps from the roadway safety management process. SafetyAnalyst was developed as a cooperative effort by the Federal Highway Administration and participating state and local agencies.

  • May 31st, 2012

This user manual provides guidance for the use of the Enhanced Interchange Safety Analysis Tool (ISATe). This tool can be used to evaluate freeway and interchange safety. The algorithms and equations used in ISATe are implemented in a Microsoft ® Excel ® workbook as software (using the Visual-Basicfor-Applications programming language). The user manual consists of three chapters. The […]

  • May 1st, 2012

This guide provides examples of opportunities for integrating the AASHTO Highway Safety Manual into the project development process. This includes integrating methods from the Highway Safety Manual into planning, alternatives development and analysis, design, operations, and maintenance. The guide provides a description of each of these steps in the project development process, and then provides a discussion of the […]

  • February 9th, 2012

The Highway Safety Manual (HSM) was published by the American Association of State Highway and Transportation Officials (AASHTO) in the spring of 2010. Volume 2 (Part C) of the HSM includes safety predictive methods which can be used to quantitatively estimate the safety of a transportation facility. The resulting information can then be used to provide guidelines to […]

  • June 9th, 2011

This primer presents an introduction to the topic of addressing safety as part of the environment analysis process, as directed by the National Environmental Policy Act (NEPA). It presents practitioners with basic concepts for including meaningful, quantitative analysis of project safety issues and for taking advantage of the latest tools, research, and techniques for improving road safety within […]

  • June 3rd, 2010

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 […]