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                DDSA Crash Tree Maker
**Description:**
        The DDSA Crash Tree Tool is an Excel-based software tool that allows users to generate crash tree diagrams based on the NHTSA Fatality Analysis Reporting System (FARS) or other crash datasets. Crash tree diagrams can be used as part of the systemic safety analysis process to help analysts identify and select the facility types where the focus crash types most frequently occur. The crash tree can have several different formats, depending on agency capabilities and data availability.
    
          **Tool Type:**
        Software
    
    
    
          **Owner Source:**
        federal
    
          **Sponsor/Owner:**
        Federal Highway Administration (FHWA)
    
        **Published:**
      2013
    
        **Availability:**
      This software is available free of charge at the following link:DDSA Crash Tree Maker

Related Resources

DDSA Tree Tool User Guide: This **user’s guide** provides an overview of the software. It guides users through the basic operations, including installation, importing data, developing a crash tree, and troubleshooting.

Sample Crash Tree Diagram: This **sample** is an example of the crash tree diagram produced by the software.

DDSA Loading FARS Data: This **video** demonstrates the process of using the software with FARS data.

DDSA Loading State Data: This **video** demonstrates the process of using the software with State data.

Systemic Safety Project Selection Tool: This **report** provides additional information about the systemic safety analysis process, including examples of crash tree diagrams. U.S. DEPARTMENT OF TRANSPORTATION

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