In and around the station
Information about how your details are used to improve our services in and around the station.
What personal information do we use?
We use WiFi tracking to improve our services and/or increase your safety in and around the station, which requires your MAC address. The MAC address is hashed immediately, so that we cannot follow you around the station: this means that the MAC address is translated into a string of random numbers. This string is stored on a server, where we hash the string again. We then "cut off" some of the numbers, so that there is no way that the string can lead back to you.
We also use sensors to make passenger counts and to analyse local passenger flows. The footage recorded by these sensors is not saved on the sensor or in any other way. In the past, NS also used Bluetooth tracking in addition to WiFi tracking, but this has changed since 7 June 2018.
What do we use your personal information for?
Every day, more than 1.2 million travellers use the train stations in the Netherlands. As hubs of pedestrian traffic and public transport, a station is a special location that lets you transfer between trains, urban and regional public transport, bikes, cars, and increasingly diverse services and facilities.
The principle for data processing is: justified interest.
Together with our partner ProRail, we are constantly striving to improve our services in and around the station. To that end, it is essential to gain insight into the flows , walking routes, waiting times, and waiting areas for travellers and other station users. In this context, we are currently mapping traveller flows at a number of large stations by means of sensors that detect WiFi signals emitted by mobile phones, which is also known as WiFi tracking. We use this method in combination with counter sensors to gain a complete picture of passenger flows. Processing this information is of social and commercial interest to us. We also ensure that all information generated by the sensors is processed securely and carefully, and in such a way that no information, can be traced back to individual passers-by. We guarantee your privacy to the greatest extent possible.
Stations that feature WiFi sensors can be recognised by a pictogram indicating their presence. These stations are: Amsterdam Centraal, Leiden Centraal, Amsterdam Zuid, Utrecht Centraal, Schiphol Airport, and 's Hertogenbosch. If you would like more information, please visit the joint website of NS Stations and ProRail Stations to find a contact form.
With whom do we share this information?
We contract third parties to provide IT and marketing services. These third parties process our information solely for our own internal use, and for no other purpose. We have made agreements with these parties pertaining to the processing of personal information.
We are authorised to provide your personal information to parties outside the European Economic Community under certain circumstances. In that event, we will take suitable measures with these parties, for example by agreeing to the standard provisions required by the European Commission.
How long do we store your information?
We do not retain the MAC address used to improve our services. We store the hashed MAC address, or the random string of numbers, for up to 24 hours. The twice hashed MAC address stored on the server is retained for up to 5 years, as this lets us investigate long-term trends (in case of station reconstruction projects, for instance).
The footage recorded by counter sensors is not stored n the sensor or in any other way.