TRA:WELL Study / Web Survey on Children's Mobility & Well-Being

The study

TRA:WELL is a research study by BOKU University Vienna examining how mobility and physical activity relate to the well-being of children in Austria. To collect its data, the study needed an online questionnaire that could capture responses reliably and accurately.

As the developer on the project I was responsible for turning the researchers' questionnaire into working software: a web survey that presents the right questions, validates the answers and stores every response in a form the study could analyse.

Questionnaire design

Questionnaire design carried the project. The survey had to lead participants through the study's questions in a clear order, with a structure and wording that leave no room for misinterpretation, because in research every ambiguous answer is a lost data point.

I broke the questionnaire into small focused steps, kept every interaction simple and validated answers as they were given, so participants could concentrate on the questions rather than the interface.

Implementation

The survey runs on an Angular frontend written in TypeScript with a PHP backend. The frontend renders the questionnaire and guides participants through it; the backend enforces the survey rules, validates each submission and persists the responses for the study.

The study examined children's well-being by collecting mobility data over a full week. That made an intuitive questionnaire essential, one that keeps the flow between survey days unbroken so the dataset ends up complete and consistent.

Outcome

The TRA:WELL study received a dependable data-collection instrument: a web survey that gathered structured responses on children's mobility, physical activity and well-being across Vienna and the surrounding region.

The collaboration with BOKU University Vienna also outlasted the study. In 2025 the university returned for a second custom survey project, an online questionnaire on mobility and traffic in Eisenstadt.