U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Flow diagram describes the steps to be taken in collecting and analyzing data, as follows:
Step 1: Collect Safety Roadway, and Exposure Information (Manual: Section 2).
Information can be collected from:
Step 2: Record Inforamtion for Safety Analysis (Manual: Table 1)
Compile information in a table to determine if patterns emerge and to track responses to known crash locations.
Step 3: Analyze Data (Manual: Section 3)
Data can be analyzed in the following ways, based on available information:
Step 4: Select Countermeasures (Manual: Section 4)
Details from the crash data can provide clues about what treatments are the most appropriate. Based on the availability of data, different approaches can be taken: