A smartwatch companion app can guide passengers step by step without them reaching for a phone.
Standing in a packed minivan, one hand on a rail, the other holding a phone to check the next stop. Anyone who rides public transport knows the problem. The moment you most need directions is the moment your hands are least free.
The study starts from a practical observation about coverage. Google Maps can provide public transit navigation on Android devices, but its availability is limited to certain cities and regions. That gap leaves room for local developers to build their own transit apps, which then have to solve the interaction problem on their own.
The researchers proposed an input interaction method built around Android Wear devices. The system splits the work between a smartwatch and a phone: the watch handles the input and the glanceable guidance, while the phone does the heavier route calculation and sends the itinerary back.
The interaction is organised into three phases that follow how a passenger actually travels.
The evaluation suggests that simplifying a step by step directions app down to a wearable device is feasible for future implementation. The researchers also note a caveat: a watch interface may reach a different usability level than a traditional mobile map application. Moving directions to the wrist is not simply a matter of shrinking the screen.
For transit apps, the takeaway is that a second screen can carry the parts of navigation that do not need a map. A stop name, a countdown, and a vibration at the right moment may be enough to get someone off at the right place.
Brata et al. (2017). Design of public transportation navigation system on android wear device. 2017 International Conference on Sustainable Information Engineering and Technology.
