Nudges were introduced to encourage adolescents to fasten seat belts and raise awareness of potential road dangers:
- A large sleeve was added around the seat belt making it more salient. Sitting on the seatbelt became uncomfortable due to the design of the sleeve;
- Posters with impactful messages were sticked to bus windows;
- Seat covers representing crash test dummies made the safety benefits of the seat belt more salient;
- Floor stickers reminded adolescents of the seat belt installation steps along with a voice message triggered by the driver at departure.