Product Design: Self-Driving Rides for Unaccompanied Children and Their Guardians
Company: Google
Role: Product Manager
Category: Product Design & Strategy
Difficulty: medium
Interview Round: Other
Design a service in which self-driving cars, with no human driver on board, pick children up and take them where they need to go. Decide who the service is for, walk through a ride from booking to drop-off, choose the features the app and the vehicle need, and explain how you would measure success.
```hint Replace what a driver does
List everything a human driver quietly does for a young passenger today, from checking who is getting in to waiting until an adult takes over at the destination. Decide what replaces each of those jobs when nobody is in the driver's seat.
```
### Clarifying Questions
- What age range counts as "kids", and is there a youngest age the service should accept for riding alone?
- Who can book and approve a ride: only a parent or guardian, or can an older child request one within limits a parent sets?
- Does the scope include the vehicle and its cabin, or only the app and service built on top of an existing driverless fleet?
- Is each ride for one child, or should siblings or classmates heading to the same place share a car?
### What a Strong Answer Covers
- Scope: the age range served, who has authority to book, and the exact moment the service's responsibility for the child begins and ends.
- The separate needs of guardians, child riders and the adults or institutions at either end, with a reasoned focus.
- A ride journey that names the failure points unique to an unaccompanied child in a car with no driver, from finding the right car to the handover at the destination.
- Features across the app, the vehicle and remote support, prioritized so that safety items are launch requirements.
- Success metrics with safety guardrails, plus regulatory, liability, privacy and trust risks and a cautious launch plan.
### Follow-up Questions
- The car reaches the destination and the designated adult is not there. What happens next?
- A child unbuckles their seat belt partway through a ride. How should the vehicle and the remote support team respond?
- What evidence would you need before extending the service to younger children or to shared rides?
Overview: A product design question asking candidates to design a service where self-driving cars with no one at the wheel pick up children and carry them to their destinations. It tests scoping, guardian and child needs, ride-journey failure points, safety-first prioritization and success metrics.