Denver International Airport needs to quit trusting Uber and Lyft to accurately report the number of trips that the ride-hailing companies’ drivers make to the airport, says Denver Auditor Timothy O’Brien.

According to O'Brien's audit issued Thursday, DIA currently relies on Uber Technologies Inc. and Lyft Inc. -- both based in San Francisco -- to report the number of trips its drivers make to the airport every month. The two companies then pay monthly fees to DIA based on those reports.

Taxi companies are tracked more closely via electronic tags, a method that officials claim can’t be expanded to include the private vehicles used by the ride-hailing industry.

The audit team said DIA staff doesn’t check the accuracy of Uber and Lyft’s self-reported data. It also said that compliance is poor enforced and there’s “a risk of underreporting revenue.”

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