What types of traffic data does Dexter contain?

Speed, intensity, travel time, bridge openings, incidents, and cycling data.

What is the difference between minute data and individual vehicle data?

Minute data provides aggregated information per minute, such as average speed or number of vehicles. Individual vehicle data shows the speed and length of each individual vehicle. This is only available in some provinces.

How does Floating Car Data work?

You draw a route on the map yourself. Dexter calculates the route and shows you the average travel time for that route, based on data from vehicles that have driven that route.

How up-to-date is the data in Dexter?

Most data is available up to a few hours ago. The system is continuously updated.

How is the quality of the data monitored?

The NDW Data Quality Team checks for completeness, timeliness and accuracy. Quality reports are available.

Dexter | National Road Traffic Data Portal

Dexter

Dexter - which stands for Data EXploration and exporTER - is NDW's historical traffic database, containing data from 2010 up to a few hours ago. It includes speeds, intensities, journey times, bridge openings, incidents and bicycle data.  

With Dexter, you can analyse traffic data for specific locations or routes. You can also easily create reports, use standard overviews or export data to CSV or Excel.

Dexter is available via mijnNDW.

Go to Dexter

What kind of data can you find in Dexter?

Up-to-date minute data from over 100,000 locations
Individual vehicle passages (IVP) for several provinces
Floating Car Data for travel time analysis on your own routes
Bicycle data from thousands of measuring points
Reports on data quality

Connecting to Dexter

Any road authority that wants to use traffic data can get started with Dexter via mijnNDW. No extensive onboarding is required: most data is available to affiliated partners of NDW.

Help and support

Manuals, instructions and videos are available via the NDW documentation portal.
If you have any questions about data quality, exports or filters, please contact the NDW helpdesk.