N/A N=5,856 Randomized Single-blind Prevention

Impacts of Subsidized Ridesharing on Drunk Driving, Alcohol Consumption, and Mobility

Driving Drunk · Alcohol Drinking

Bottom Line

View on ClinicalTrials.gov: NCT04949711 ↗

Enrolled (actual)

5,856

Serious AEs

0.0%

Results posted

Apr 2026

Primary outcome: Primary: Number of Participants Involved in Alcohol Impaired Driving Incidents — 771; 802; 1670; 1665 Participants

Study Design & Population

Study type: Interventional
Phase: N/A
Interventions: ridesharing voucher (Behavioral); online shopping voucher (Behavioral)
Age: Adult, Older Adult · 21+ yrs
Sex: All
Sponsor: Columbia University
Primary completion: Mar 2025

Outcome Measures

Outcome	Result	p-value
PRIMARY Number of Participants Involved in Alcohol Impaired Driving Incidents	771; 802; 1670; 1665	—
SECONDARY Change in Number of Days in Alcohol Consumption	3.21; 3.07; 2.83; 2.82	—
SECONDARY Average Number of Trips to Alcohol Outlets	1.12; 0.92	—
SECONDARY Average Duration of Trips to Alcohol Outlets	1.12; 0.92	—
SECONDARY Change in The Drinker Inventory of Consequences Score	0.90; 0.87; 0.70; 0.68	—

Summary

The purpose of this research study is to understand people's alcohol use in public places and their risks for harm. The overall goal of this study is to test the effects of subsidized ridesharing as an intervention to reduce self-reported alcohol-impaired driving, along with alcohol consumption and changes to mobility.

Eligibility Criteria

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

View full record on ClinicalTrials.gov →

Data sourced from ClinicalTrials.gov (NCT04949711). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.