Research project


Mobility behaviour in Switzerland

The MOBIS study is now over.

MOBIS:COVID-19 study


Results will be published here and updated as they become available.


  • Gao, Q., J. Molloy, and K.W. Axhausen (2021) Trip purpose imputation using GPS trajectories with machine learning, ISPRS International Journal of Geo-Information. (Link)
  • Molloy, J., C. Tchervenkov, and K.W. Axhausen (2021) Estimating the external costs of travel on GPS tracks, Transportation Research Part D: Transport and Environment, 95, 102842. (Link)


  • Gao, Q. (2020) Exploring the interaction between trip purpose and mode choice using GPS-based trip data, Semester Project, IVT, ETH Zurich, Zurich. (Link)
  • Molloy, J. (2021) Undertaking mobility field experiments using GPS tracking, Doctoral Thesis, IVT, ETH Zurich, Zurich. (Link)
  • Roth, J. (2021) Taxing externalities of individuals’ mobility: Income-related differences in response, Master Thesis, Faculty of Business and Economics, University of Basel, Basel. (Link)
  • Rytz, S. (2020) Activity spaces and innovational behaviour, Semester Project, IVT, ETH Zurich, Zurich. (Link)


  • Molloy, J., A. Castro, T. Götschi, B. Schoeman, C. Tchervenkov, U. Tomic, B. Hintermann, K. W. Axhausen (2021) A national-scale mobility pricing experiment using GPS tracking and online surveys in Switzerland: Response rates and survey method results. Poster presented at the 100th Annual Meeting of the Transportation Research Board (TRB 2021), online, January 25-29. (Link)

A complete list of publications can be found on the ETH Zurich website:

Project description

Mobility is constantly changing. Transport planning therefore requires regular adjustments to cope with population growth, changing needs and technological progress.


How can mobility be made more efficient in Switzerland?

Transport systems

What is required from transport systems?


How shall future transportation look like?

Information for study participants



To complete the survey, you will need the 5-character participant ID that you received in the invitation letter.

Using the App

Click here for more detailed information on how to use the Catch My Day app.

Info sheet

This PDF summarizes all relevant information for study participants.


Questions and answers related to the study

What is the time frame of the study?


Who is conducting the study?

MOBIS is a joint project undertaken by the ETH Zurich, the University of Basel, and the Zurich University of Applied Sciences.

Who is financing the study?

MOBIS is co-financed by the Swiss Agency for Innovation Promotion (Innosuisse) and the Federal Department for the Environment, Transport, Energy and Communications (DETEC).

Who commissioned the study?

MOBIS is a study within the scope of the Swiss Competence Centres for Energy Research (SCCER Mobility) and Energy, Society, and Transition (CREST).

What are the goals of the study?

The study aims at conducting surveys related to mobility and analysing mobility behaviour with methods at the frontier of scientific research, in order to inform policy with respect to optimising transport planning in urban areas.

Questions and answers related to study participation

Who can take part in MOBIS?

Participation in MOBIS is by way of a written invitation to randomly selected inhabitants of Swiss urban agglomerations. The invitation is non-transferable and may not be shared with others. The participation in the smartphone study is subject to additional inclusion criteria.

How can I participate in the survey?

Click on (or type the link into your internet browser). To begin the survey, enter your 5-character participant ID.

In which languages can I fill in the survey?

The MOBIS survey is available in English, German and French.

How long is the survey?

The online survey takes about 10 minutes. At the end of the smartphone study, there is one additional survey.

Where can I find my 5-character participant ID?

Your participant ID was sent to you in a personal letter. In case you cannot find it anymore, please contact us via email at:

Can I participate in the survey only, but not the smartphone study?


Can I participate in the smartphone study, but not in the survey?

No. To participate in the smartphone study, you first have to fill in the survey. Thereafter you will be automatically forwarded to the registration for the smartphone study, if you fulfil the inclusion criteria.

What are the inclusion criteria for participating in the smartphone study?

To participate in the smartphone study, you need to fulfil the following requirements:

  1. Receipt of the written invitation (including the 5-character participant ID)
  2. 18-65 years old (at the end of 2018)
  3. Regular use of a car (at least two days a week)
  4. Live in a metropolitan area in the German- or French-speaking part of Switzerland
  5. Use of a smartphone that can install the tracking app
  6. Be able to walk 200m without pain or any other discomfort
  7. You must not work as a professional driver
  8. Sign the consent form
What are the tasks when participating in the smartphone study?
  • Fill in the online survey and registration
  • Download and activate the app
  • Read weekly emails on study progress
  • Fill in a final survey
What is the workload associated with participating in the smartphone study?
  • Online survey and registration: approx. 15 min.
  • Download and activate the app: approx. 5 min.
  • Read weekly emails on study progress: approx. 10 x 5 min.
  • Final survey: approx. 30 min.

In sum, approximately 2 hours.

How long is the smartphone study?

The smartphone study will last two months.

When do my two months start?

Your two-month smartphone study period starts the moment your first trip in Switzerland is recorded by the app.

Is there a deadline for starting the smartphone study?

The deadline for starting the smartphone study is 15.11.2019. However, we recommend you start as soon as possible so that we can help you if ever you have problems or questions.

Can I turn off the tracking during the smartphone study?

We recommend that you try to keep your smartphone on and the tracking active for the entire duration of the study.

Deactivating the tracking,
logging out of the app, or
turning off your smartphone
can negatively affect the quality of the study results.

The effect of the app on your smartphone performance heavily depends on the exact phone model and operating system. Unfortunately, this is out of our control. We suggest you charge your phone when not traveling, for example at home or work, instead of turning it off. We apologize for any inconvenience caused.

How many days do I need to be tracking in Switzerland?

You must be successfully tracking in Switzerland on at least 30 days during the two-month study period, i.e. at least 15 days each study month.

Can I travel abroad during the smartphone study?

This study requires you to be actively tracking in Switzerland on a regular basis during the two-month smartphone study.

If you intend to travel abroad and will return before 15.11.2019, you can simply install the app and start the tracking when you return.

If you intend to travel abroad for more than 2 weeks during the two-month study, we recommend you do not participate in the smartphone study.

What is the participant ID for?

The participant ID breaks the link between data and study participants. The researchers directly involved in the study can link participants to their participant ID, however, this is not possible for third parties. This pseudonymisation makes it possible for the study to link responses from the surveys with the data from the smartphone tracking, which would not be possible with complete anonymisation.

What data are collected by the app?

The app collects your mobility behaviour based on GPS tracks. These mobility data are used to analyse transport. These analyses allow for the identification key mobility indicators (e.g. mode choice). Further, trip purposes are derived based on multi-day travel patterns, and spatial analyses are conducted. For technical details, see our data privacy policy.

What are the data being collected for?
  • The data will be exclusively used for research purposes.
  • The data will be archived according to data protection requirements and made available for future research projects. The identification of individual persons will not be possible.
  • The data will not be sold to third parties.
  • Only aggregated results will be published to guarantee anonymity.
What is the content of the emails that I will receive?

You will receive weekly summaries of your mobility, by transport mode.

Will I get compensated for participating in the smartphone study?

Yes. For your complete participation you will receive CHF 100. Complete participation implies tracking of mobility during the full two months of the study duration and filling in the final survey. Will will ask you about the details for the transfer of the compensation in the final survey.

Will I get compensated for the online survey?

No. Unfortunately, we cannot offer any compensation for the short online survey.

Questions and answers related to using the app

What steps do I need to complete in order to use the app?
  1. Install the app on your smartphone
  2. Create an account
  3. Activate your account
  4. Log into the app

For a detailed explanation on how to use app, please read these instructions.

What is the name of the app?

«Catch My Day»

Where can I download the app?

The Catch My Day app can be downloaded using the following links:

Is the app also available for Windows?


How do I create my Catch My Day account?

Once you have installed the app, open it and click on REGISTER to create an account. Then, enter :

  1. your email address,
  2. a password of your choice (minimum 6 characters), and
  3. your participant ID (in CAPITALS).

Why is my registration code (participant ID) invalid?

This usually happens when you have already created your account, but try registering again. Please make sure that your account is activated and then simply log into your account.

How do I activate my account?

You will receive a confirmation email from after having successfully created your account. Please click on the link in this email to activate your account.

Why did I not receive the confirmation email?

It is possible that the confirmation email was sent to your spam folder. Please check there first.

Otherwise, it is also possible that you made a small typo when entering your email address. We regularly try to detect and fix such cases. If you have not received the confirmation email and have not heard anything from us after a few days of creating your account, please write us an email and we will help solve the issue.

How do I log into my account?

Once you have clicked on the activation link in the confirmation email, your account will be activated.
Then open the app, click on the LOGIN button and enter the email address and password you chose when creating your account.
Please note that it may take a few days before your recorded tracks appear in the app. We thank you for your patience.

Why are some buttons missing?

This problem has been reported by several users. The app development team has released a new version of the app that should fix this problem. Please update the app to be able to see the missing buttons.

Why are my tracks not appearing in the app?

For technical reasons, your last trips may only appear in the app after some time. If your trips do not appear for several days, please make sure that your settings are correctly set.

How should I correctly set my phone settings?

In the app settings, the "Tracking active" toggle must be activated.
In your smartphone settings, you must give the Catch My Day app permission to access your location.

However, different smartphone models and mobile operating systems may require additional settings.
We highly recommend you read the app instructions for more details.

Do I need to validate my tracks?

You may notice that the app does not always correctly record your mobility behavior. Indeed, even the best algorithms for detecting the chosen transport mode usually only achieve about 80% accuracy.
We would therefore be grateful if you could occasionally validate your trips in order to improve the quality of the results of the MOBIS study. Even only a few validations can significantly improve the accuracy of the app.
For a more detailed explanation on how to validate your trips, please read the app instructions.




Contact us

by e-mail:

or by telephone: 058 934 45 09


ETH Zürich Logo

Swiss Federal Institute of Technology

Institute for Transport Planning and Systems

Uni Basel Logo

University of Basel

Faculty of Business and Economics


Zurich University of Applied Sciences

Institute of Sustainable Development