After using the Create TOPS interface, the user can move on to utilize other interfaces in the Sample Adequacy tab. The Adjust TOPS interface () is one available sample interface. This interface is used to find small segments where TOPS data items do not align at exact measures and merge them. In order to accomplish this goal, the interface possesses three action tabs: Summary, Detail, and Changes.

Summary Tab

The Summary tab is used to identify small segments, with a maximum length specified by the user, where TOPS data items do not align at exact measures and merge them. To find the small segments, users can follow these steps:

1. Select a radio button option in the "Data to Adjust" section. Select "Statewide" to locate small segments in the full TOPS data set or "County" to locate small segments in a subset of data based on the selected County in the picklist.
2. Set the data item precedence by selecting the order for obtaining attribute values in the "Parent TOPS Data Item Precedence" list. This will determine how small segments will be merged into adjacent segments. To change the order, click the desired data item and use the up or down arrows.
3. Enter a maximum segment length in the "Measure Tolerance" textbox. The measure tolerance can be in units of feet or miles which is selected in the picklist.
4. Click the "View TOPS Changes" button.

After running the changes, the "TOPS Changes Summary" section of the interface will display this data in the three, view-only textboxes:

• Total Samples Required Before Changes -- the overall number of samples required based on the original TOPS set.
• Total Samples Required After Changes -- the overall number of samples required based on the modified TOPS set.
• Difference in Samples Required -- the difference in samples (original/modified).

The "Stratums with Required Sample Changes" table below the textboxes breaks down the "Difference in Samples" value and shows which stratums would be affected by the changes. These numbers can appear negative, indicating less required samples, or positive, indicating the stratum grew to require more samples.

Detail Tab

The Detail Tab is used to compare the number of TOPS locations and required samples from the original TOPS set against the number of TOPS location and required samples from the modified TOPS set per Functional System, Urban Code, and Volume Group stratum.

When the rows of the table are collapsed ( caret), they will only show general information about the Functional Systems and their changes. In this state, the rows will simply state "[#] Urban Areas with changes to Number of TOPS/Required Samples" across from the associated Functional System title. However, the rows can expand to reveal the specific Urban Area entries and their changes if the user clicks the caret.

In the expanded state, the first row of numbers in the Urban Area entry contains the original TOPS set, and the second row contains the modified TOPS set. If a number is shown in blue in the second row, this indicates the number of TOPS sections that have experienced a change by segment merge or a merge into a different stratum. If a number is shown in purple, this indicates the number of TOPS sections that have experienced a change in required samples.

Changes Tab

The Changes tab is used to identify the small segments where the five TOPS data items do not align based on their filters. The table contains the TOPS data item, Route ID, adjusted measures (from/to), original measures (from/to), old value, and adjusted value columns. The modified measures will appear in bold in either the "Adjust From Measure" or "Adjust To Measure" column depending on which measure needs to be updated.

Saving Adjust TOPS

The modified data set can be saved on any of the three tabs (Summary, Detail, or Changes) by selecting the "Update TOPS" button at the base of the interface. This selection will update the selected HPMS Data Table and TOPS table with the modified TOPS set. The user can also commit the modified data to the original source by selecting the "Save to Source" checkbox before clicking "Update TOPS."