The problem Quick Ride solves

The process of renting a car is highly centralized, where the car rental company being the main point of contact for the driver to rent cars. Car rental companies need to maintain a fleet of cars, as well as car stations and staff to efficiently run their operations, which makes up for bulk of their operating costs. Car rental companies cover these costs from (high) rental rates charged to their customers.

Challenges I ran into

Handling various edge cases in ethereum contract. To make the contract more reliable using the rating system. Logics to avoid double spending.