Five steps from a problem to its solution.

Help me design and build a first working prototype for this problem in Jagdalpur, Chhattisgarh, India.

Problem: Villagers in Chhattisgarh's remote tribal blocks can't easily find when the new rural buses run, and thousands of villages still have none.
Who it hurts: People in Bastar, Surguja and the next eight districts who travel to hospitals, schools, markets and block offices, often with only two buses a day.
The moment it hurts: Deciding whether to wait at the roadside for a bus that may already have passed, or to pay more for a seat in a pickup truck.
What people do today: Timetables sit on a state portal and an app; route data in a format map apps can read is still being prepared, and many villagers do not have smartphones.
Why it is still unsolved: The network is new and growing fast, routes run twice a day on long rural roads, and the next phase has to find which unconnected villages have enough demand.
What solved looks like: Rural bus timetables published as open GTFS data and on map apps, a missed-call or SMS line that tells a villager the next bus at their stop from live tracking, and a simple way for villages without a bus to register demand for one.
Where: Jagdalpur, Chhattisgarh, India

First, list what you would need to learn from the people affected before building, as interview questions.
Then propose the simplest version that would help, the screens or messages it needs, and the data it would use.
Keep it cheap to run, accessible, and respectful of people's privacy. Flag anything you are unsure about instead of guessing.