Road selection in Work Zone Performance Report is similar to road selection across the Probe Data Analytics suite. Since Work Zone Performance Report is only useful if the work zone location is well ordered, you should select a single work zone comprised of contiguous, unidirectional segments for an accurate report. To support this, there are fewer options for road selection in Work Zone Performance Report: Select by Road and Select on Map.
Road Selection
Probe data providers make anonymized, aggregated speed data available by segment. A segment represents a particular stretch of roadway as defined by the data provider.
Note: The geometry of roadway segments is defined by each data provider and archived segment data are generally available in two categories:
- TMC (Traffic Message Channel) segments: Typically span between interchanges, major cross streets, and geographic or jurisdictional features (like rivers or county
borders). - Static sub-TMC segments: Data providers may use finer-granularity segmentation to show roadway speeds at a higher geographic resolution, called “XD” by INRIX and
“TS” by HERE. These segments may also cover additional roads beyond what is included in the TMC network.
The first step in the road selection process is selecting a segment type and the corresponding probe provider. Next, you select roads by using one of the tab options.
Depending on the tool, there are multiple tab options to select roads in PDA. The most common is to search and select a road under the Road tab, then use the entire length or choose a partial length.
Select by Road
The Road tab allows you to search roads by name.
- To narrow down the search, a dropdown menu lets you restrict the search to a specific state.
- Once you search for a road name, matches to the search will appear and you can select the desired road.
- After selecting a road from the drop-down, a new panel will open allowing you to refine the road by toggling on and off individual directions or reducing your selection under the partial option.
- Multiple road search results can be added to your selection, and you can remove them by selecting the close button
.
- Selections can also be hidden from the map by selecting the eye button
. This affects only the drawing on the map; it does not change your selection.
In most cases, you will want to narrow your road selections by selecting partial. When you select partial the From: intersection and To: intersection text box menus appear.
Your road selection will be narrowed to the roadway between the selected intersections. You can use the drop-down menu to scroll through and select an intersection or you can type a crossroad name into the text box to search for an intersection.
To further refine your road selection, mouse over and select individual segments in the map box. You can then select remove this segment. A pop up menu appears in the map box that will create a list of removed segments that allows you to manage your removed segments.
Select from map
The Select from map tab lets you select segments on the map individually or as waypoints. If you select non-contiguous segments as waypoints, the tool will automatically select all segments along the route between those waypoints even if those segments span multiple roads. The Select from map tab is only available when you have chosen TMC and XD segments from INRIX as your segment type and data provider.
To select a single segment, simply select add route after selecting your initial segment.
Route generation requires at a minimum a start and an end segment and allows you to select up to 8 waypoint segments between the start and end.
- To begin, locate and select "Click here to start segment selection".
- Next, pan and zoom to your work zone start point in the map.
- Select a start segment from the map.
- If the location is defined by just the one segment, locate and select add route to finalize your selection.
- If the location spans multiple segments, select an end segment from the map. The tool will generate a corridor on the map. When you are satisfied with the corridor, locate and select add route to finalize your selection.
Your selected roads will be identified by name and additional information (number of intersections, number of miles, and number of segments).