Product design for highway toll collection: users, pain points and a prioritized plan
Company: Amazon
Role: Product Manager
Category: Product Design & Strategy
Difficulty: medium
Interview Round: Other
Design a system for collecting tolls on highways. The interviewer leaves the scope open: you decide which part of toll collection to focus on, who the system should serve, and what it must do better than the toll roads drivers use today. Walk through the problem you are solving, the users you would prioritize, the product you would build, and how you would measure whether it works.
```hint Follow one trip through the toll point
Trace a single trip from the moment a vehicle reaches the toll point to the moment the right person has paid the right amount, once for a daily commuter and once for a first-time visitor. Find where each trip breaks today before you choose any technology.
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### Clarifying Questions
- Who is the customer: the road operator that buys and runs the system, the drivers who pay, or both?
- Which country or region is this for, and does it replace collection on existing toll roads (booths or transponder lanes) or serve a new road?
- Is there a known problem to fix, such as queues at toll points, wrong charges, unpaid tolls or high collection costs?
- Must drivers without a bank account or payment card still be able to pay?
### What a Strong Answer Covers
- A clear goal for the toll system and a north-star metric tied to it.
- The stakeholders mapped (operator, different kinds of drivers, truck fleets), with a justified focus segment.
- Concrete pain points across the whole flow: identifying the vehicle, charging it, billing and handling disputes.
- A prioritized design that deals with misreads, unpaid tolls, drivers without accounts and the privacy of location data.
- Metrics and guardrails, plus the main trade-offs.
### Follow-up Questions
- How would you add pricing that changes by time of day or congestion without confusing drivers?
- Plate-reading accuracy drops sharply in snow. What does the system do, and who absorbs the cost of the misses?
- A state agency wants to use your toll records to help police locate stolen cars. How do you respond?
Overview: A product design question asking for a highway toll collection system, with the scope left to the candidate. It tests setting a goal and north-star metric, mapping the operator and different kinds of drivers, finding pain points in identifying, charging and billing vehicles, and prioritizing a practical design.
