Uber and lyft: do they reduce drunk driving crashes?
NCT ID NCT04564599
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.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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100 people
The number who actually took part.
- Started
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Jul 2023
- Finished
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Jun 2025
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Methodist Dallas Medical Center
Dallas, Texas, 75203, United States
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