Analyse

The Analyse module provides extensive analysis capabilities for traffic data. You can select locations on the map, compare them, and generate detailed charts and reports.

Interface overview

The Analyse module consists of four main panels:

1. Top-left panel: Location selection and selection list for multiple locations
2. Bottom-left panel: Interactive map with location selection
3. Centre panel: Period selection for the data to display
4. Right panel: Charts for the selected locations and period(s)

Selecting locations

Making a selection on the map

1. Click a location on the map (count point or road segment)
2. The selected location appears in the top-left panel with all available properties
3. Click Add selection to add the location to your selection list
4. Click an empty part of the map to clear the current selection

A segment turns black while hovered or selected. Segments in the selection list are green. Checked segments in that list are purple. After hovering or clearing the selection, each segment returns to its own color.

When several NDW segments are close together and run in the same direction, a chooser is shown in the top-left panel first. Hover over a candidate to highlight its segment on the map, then click it to select the location. When there is only one matching segment, it is selected immediately.

Travel time prefixes

For travel time analyses you can select specific NDW prefixes:

• Use the dropdown at the top left of the map
• Only data from selected prefixes is shown and considered as a candidate for overlapping segments. This helps with selecting the correct trajectory.

Managing the selection list

You can add up to 50 locations to your selection list. For each location you can:

• Select/deselect: Tick locations to include them in the analysis. If no locations are selected, all of them are included.
• Remove: Remove individual locations from the list via the trash button.
• Remove all: Clear the entire selection list.

Note: when no locations are included in the selection list, the currently selected location is used for the chart update.

From Monitor or Evaluation

You can open a selection from Monitor or Evaluation directly in Analysis:

1. In Monitor select a chart, or in Evaluation select an object
2. Click Open selection in Analysis in the left panel
3. Analysis opens in a new tab; the linked measurement locations are already in the selection list

What is carried over:

• All linked location IDs of the object (each location as a separate selection; measurements are not summed automatically)
• For travel time objects, the correct network (NDW or HERE)
• For speed/volume objects, the matching metric (speed or volume)

Limitations:

• Only available when the Analysis module is enabled for the project
• Only for NDW or HERE objects of type travel time, speed, or volume (no parking or upload data; HERE volume is not supported)
• Maximum of 50 locations; if there are more, the first 50 are taken and a warning is shown

See also Monitor: Open selection in Analysis, Point Evaluation, and Line Evaluation.

Selecting a data period

Select data period

Configure the period for your analysis:

1. Period 1 (required): Select start and end date for the primary analysis period
2. Period 2 (optional): Tick Compare 2 periods to add a second period for comparison

Weekdays

Select which weekdays to include in the analysis:

• Monday through Sunday can be ticked individually
• Only selected weekdays within the period(s) are used for the calculation

Select intensity or speed

For speed/intensity locations you can choose between:

• Intensity: Number of vehicles per unit of time
• Speed: Average speed

Sum measurements

When you have selected multiple locations, you can sum the measurements:

• Tick Sum measurements to combine the values of all selected locations
• For travel times and intensities the data is summed. For speeds the average (median) is calculated.
• Requires at least 2 selected locations

Aggregation period

Choose how the data is aggregated:

• 1 minute
• 5 minutes
• 15 minutes
• 1 hour

Generating charts

After you have made a selection and set the period(s):

1. Click Update chart to run the analysis
2. The chart appears in the right panel
3. When comparing 2 periods, both periods are shown in the same chart
   • When Sum measurements is ticked, data is summed per period.

Chart options

• Zoom: Use the mouse to zoom in and out
• Zoom reset: Double-click in the chart to return to the zoomed-out level
• Hover: Move over data points for detailed information

Availability table

Below the chart an availability table is shown that indicates:

• Location ID: The analysed location
• P1: Availability percentage for period 1
• P2: Availability percentage for period 2 (if applicable)

Colours indicate quality:

• Red: < 60% availability
• Orange: 60–80% availability
• Yellow: 80–90% availability
• Green: ≥ 90% availability

Exporting data

You can export the analysis data via the respective buttons at the top right of the chart panel.

1. CSV Source: Download the raw source data as a CSV file. This includes all minutes within the selected period(s).
2. CSV Chart: Download the aggregated chart data as a CSV file.
3. Save as image: Via the button with the downward arrow, the chart can be exported as a figure (PNG).

Historical location view

At the bottom left another panel is available. Over time, measurement locations appear or disappear. Here you can select a specific date to view available measurement data for that day:

1. Choose a date in the date picker
2. Click Update to load the data for that date
3. The map shows only locations with available data for the selected date

Getting started

1. Select one or more locations on the map
2. Add them to your selection list
3. Select the desired data period and weekdays
4. Configure the analysis settings (aggregation, intensity/speed)
5. Click Update chart to run the analysis
6. View the chart and availability table
7. Export the data if needed