This is a tool that is located on the Sample Adequacy section of the Sample Adequacy tab.
Function
The Potential Samples interface () is used to identify locations where additional samples can be added to meet HPMS sample requirements. The interface provides a reviewable list of sections that includes unsampled TOPS sections and existing sample sections.
Sections
The Potential Samples interface is divided into 5 sections: Data Table Information and Stratum Information, Data Completeness, Potential Sample Table, Sample Table, and Button Controls.
(1) Data Table Information and Stratum Information
The Data Table Information and Stratum Information section contains general information about the currently selected HPMS Data Table and the selected stratum. This section hosts the Data Table and Year dropdown controls, alongside these controls:
| Control | Used To... |
| Volume Group Dropdown | Select from which volume group to view samples.* |
| Functional System Dropdown | Select from which functional system to view samples.* |
| Urban Code Dropdown | Select from which Urban Code to view samples.* |
| Find Now Button | Find TOPS sections based on the Functional System, Urban Code, Volume Group, and HPMS Data Table selected. |
*Auto-populated if redirected to this screen from Check Adequacy or Expansion Factors.
(2) Data Completeness
Beyond the filtering dropdowns, the interface also allows segments to be returned and ordered by the completeness of data. There are some controls provided here:
| Control | Used To... |
| Percentage of Data Items with Values Checkbox | Order the segments by the completeness of the data. |
| AADT not within [#]% of Volume Group Upper/Lower Bounds Checkbox | Provide the option to show which segments do not meet an AADT value within a specified percentage. |
| Prioritize/Weight Data Items Link | Open the “Prioritize/Weight” interface where the user can specify the order of priority for data items. |
| Select Priority Method Radio Button | Allow users to set the priority method to "By Ordering" or "By Weighting."* |
| Double Arrows ( |
Move data items to the top/end of the list.* |
| Single Arrow ( |
Move data items up/down one row.* |
| Set Priority Button | Confirm the priority order of the data items.* |
*All controls listed here are located on the Prioritize/Weight Data Items interface which is accessible through the Data Completeness section.
(3) Potential Sample Table
The Potential Sample Table will be populated with TOPS sections within the specified Volume Group, Functional System, and Urban Code selected. There is one control offered in this section:
| Control | Used To... |
| Row Checkboxes | Add segments as a sample. |
(4) Sample Table
The Sample Table displays the number of required samples, existing samples, samples that are needed to meet requirements (calculated by number of existing minus the number of required), and total amount of samples. This section will only be populated after the "Find Now" button is clicked. The "Selected" and "Total" Samples will increase or decrease as segments are selected as samples.
(5) Button Controls
The final section of this interface consists of four buttons. These buttons are:
| Control | Used To... |
| Save to Source Checkbox | Enforce that changes applied to the HPMS Data Tables are also applied to the HPMS Samples data source. |
| Random Select | Open the Select Random Samples interface which will select segments at random based on user specifications. |
| Add Samples | Add samples to the stratum. |
| Cancel | Exit the Potential Samples interface without adding samples. |
Number Colors
The Potential Sample Table hosts various numbers in its columns which can appear in different colors. The table below lists each color and its associated meaning.
| Color | Indicates that... |
| Green | Segments are current samples. |
| Orange | Segments do not meet segment length requirements. |
| Red | Segments do not meet AADT criteria. |
| Blue | A link is present. This is only available in the Completeness column which shows how many data items exist along the sample section of the total data items collected. The link leads to a pop-up list showing which data items exist for the sample. |
Workflow
The specific actions and their connection are described on the Workflow portion of the Help Guide. Click here to see how these elements interact on the Potential Samples interface.
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