Randomized Trial on Mobile Technology and Young Drivers' Cellphone Use

Inclusion Criteria:

* Adults 18-24 years of age at time of recruitment
* Must have ownership and exclusive access to a passenger vehicle
* Must have car insurance with at least state-minimum coverage
* Must live in Greater Columbus (Ohio) area
* Must drive at least 2 days a week on average
* Must have functioning iPhone or Android smartphone with an active phone service account (Ex: Verizon, AT\&T, etc.)
* Must self-report handheld calling or texting while driving (≥ 1 time/week)
* Must not be enrolled in another driving-related research study during the study period.
* Must be willing to be randomized and comply with study requirements
* Must have no plans to change cellphones or vehicles in next 6 months or agree to transfer FleetSafer app/DriveCam if they change cellphones or vehicles
* Must speak and read English

Exclusion Criteria:

* Drivers under 18 years of age
* Drivers holding learner's permits
* Drivers who share a vehicle with a family member or others
* Infrequent drivers (Drive 2 days a week or less)
* Participants from the pilot R21 project
* Current users of a cellphone-blocking app or driving mode who do not agree to uninstall/de-activate the app for the duration of participation in the study
* Current users of a car insurance monitoring device (physical device or app)