Free uber vouchers might keep drunk drivers off the road

NCT ID NCT04949711

Completed Knowledge-focused Sponsor: Columbia University Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether giving people subsidized rideshare vouchers (like Uber credits) could reduce drunk driving and alcohol consumption. Over 7,000 adults who drink at bars and own a car participated. Researchers compared those who received rideshare vouchers to those who received online shopping vouchers, tracking self-reported impaired driving and drinking habits over one week.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: ridesharing voucher
What this could lead to: If it works, this could point toward a simple, scalable way to reduce drunk driving by making safe rides home more affordable.
What could go wrong: This is a completed behavioral study, not a treatment trial. The results rely on self-reported data, which may not be fully accurate, and the effect may vary by city or population.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

Alcohol Drinking Driving Under the Influence

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

ALCOHOL DRINKING DRIVING DRUNK

Contacts and locations

Locations

Columbia University Irving Medical Center

New York, New York, 10032, United States

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