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Uber and lyft: do they reduce drunk driving crashes?

NCT ID NCT04564599

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
The trial has finished. Results may not be published yet.
Stopped early This study
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This status has not been confirmed recently, so it may be out of date.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 examined whether ride-sharing services like Uber and Lyft are linked to fewer alcohol- and drug-related car accidents and sexual assaults. Researchers collected data from trauma registries, transportation departments, and crisis centers in the Dallas area. The study was terminated early, so results are limited.

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.

Participants

100 people

The number who actually took part.

Started

Jul 2023

Finished

Jun 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.

Who is studied

This will be a retrospective study with data collected from the trauma registry. Patient population that will be looked at will be Males and Females 18 years or older who have tested positive for blood alcohol or drug screen and were involved Motor vehicle collision (MVC) or auto-ped.

Ages

18 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: * 18 years or older * Positive blood alcohol or drug screen * Motor vehicle collision (MVC) or auto-ped Exclusion Criteria: * Younger than 16 years * Younger than 18 years * Pregnant women

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Conditions

The condition(s) this trial relates to.

Alcohol Drinking Alcoholic Intoxication poisoning substance abuse

As listed by the trial registrant

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

Contacts and locations

Locations

  • Methodist Dallas Medical Center

    Dallas, Texas, 75203, United States

More trials for these conditions

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