Highway Safety Analysis Toolbox
State Policies and Procedures on the Use of the Highway Safety Manual (HSM)
Scale and Scope of Safety Assessment Methods in the Project Development Process
AASHTO's Highway Safety Manual
The HSM introduces a science-based technical approach that takes the guesswork 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. The HSM provides the following tools:
- Methods for developing an effective roadway safety management program and evaluating their effects.
- A predictive method to estimate crash frequency and severity.
- Guidance on the development and application of crash modification factors to estimate crash reductions.
NCHRP 600: Human Factors Guidelines for Road Systems
The HFG serves as a complement to existing and planned design guides and standards, such as the MUTCD, AASHTO's Green Book, and the HSM, to promote improved safety for highway users. After using traditional resources to develop possible design alternatives to improve safety on an in service or planned intersection or section of roadway, the practitioner may then use the HFG to enhance the possible solutions. The easy-to-use guidelines in the HFG provide the highway designer and traffic engineer with objective, defensible human factors principles and information that can be used to support and justify design decisions. The HFG will allow the non-expert in human factors to recognize the needs and limitations of the road user in a more effective manner in the design and operation of roads that are safer for all. When reviewing either existing or planned roads or intersections, highway designers and traffic engineers are strongly encouraged to use the HFG to identify and develop the safest solutions for road users.
NCHRP Report 500 Series
Louisiana-specific Cost of Crashes* (Provided by Highway Safety Research Group, 2016)
Crash Severity Type
|Crash Report Injury Code
||Unit Cost Per Crash |
|| $1,710,561 |
|Property Damage Only (PDO)
Total estimated cost for Louisiana crashes = $8.6 billion/yr
*NOTE: This table is for informational purposes and is intended to be used in conjunction with benefit cost analyses for potential safety projects.