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Free uber vouchers might keep drunk drivers off the road

NCT ID NCT04949711

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

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

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.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

7,034 people

The number who actually took part.

Started

May 2022

Finished

Apr 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

21 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * ≥ 21 years old * Reside in a study city * Have a driver's license * Have access to a motor vehicle * Have consumed alcohol in a bar in the last 30 days * Own a smartphone * Read English Exclusion Criteria: * Non-English speaking participants

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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

More trials for these conditions

Other studies related to the condition(s) this trial covers.