Data Collection and Analysis
Once a perceived problem is identified, data must be collected
and analyzed (Steps 2 and 3 of the previous procedure). This process
involves the steps listed in the table below.
Step | Action | Notes: |
---|---|---|
1 | Identifying data sources | See “Data Sources” later in
this section. |
2 | Collecting data | See “Data Sources” later in
this section. |
3 | Determining an analysis strategy
(How best to determine if a problem exists.) | See “Data Analysis and Interpretation”
later in this section. |
4 | Analyzing data | See “Data Analysis and Interpretation”
later in this section. |
5 | Displaying and reporting analysis
results | For example, a graph or chart
may display the data over time to show that the problem is either
increasing or decreasing in frequency. |
6 | Identifying high-incidence crash
locations | Of all crash locations in a
jurisdiction, are there any that appear more frequently than others? |
7 | Identifying overrepresented
crash characteristics | For example, youth with alcohol
involvement. See “Data Elements” later in this section. |
8 | Analyzing support problems (Who
has the information you need? Will they share it? Is the data reliable?) | Attempt to solve data access
problems by enlisting the support of agencies or offices that collect
or possess the information you need. See “Data Sources” later in
this section. |