Design a Mobile App From Scratch: Real-Time Street Parking Spot Finder

Interview prompt, live, 30-40 minutes: "Design a mobile app that helps drivers find an open street parking spot near their destination in a busy downtown area, in real time. Walk me through your approach from scratch."

1. Ask your clarifying questions and state your assumptions.
2. Frame the core job-to-be-done.
3. Define MVP scope.
4. Sketch the information architecture and justify it against this app's specific usage context (driving).
5. Wireframe the core flow, explicitly addressing how the design accounts for the user likely being behind the wheel.
6. Write one piece of microcopy that reflects the driving-safety constraint.
7. Name one accessibility consideration.
8. Propose HEART metrics for at least three categories.
9. Close with a one-sentence summary and the single highest-priority open risk.