The ride share company Uber says it surges prices at high-demand times, such as holidays, or in bad weather.
The company's practice has helped earn Uber an 'F' from the Better Business Bureau, which cites that consumers don't understand Uber's pricing.
In a surging area, riders see an alert on the application that warns them of the surge. It asks the customer to confirm and accept the higher fare.
Currently, there's no cap on how high the surge can go. A Chicago ordinance says the city reserves the right to cap it in the future, but that hast happened yet.
For those who want to avoid paying extra, they can hail a cab. If no cabs are available, Uber can alert customers when a surge is over. Uber drivers also say people can walk to an area that isn't as crowded.