Participants are asked to buckle up and not engage in handheld phone use while driving. No further messaging will be provided about their behavior, and participants will not receive financial incentives for avoiding risky driving behavior.

Participants will receive a multicomponent safer driving intervention based on behavioral science. This will include persuasive education, WOOP (mental contrasting with implementation intentions) and customized habit tips.

Participants will receive the entire multicomponent safer driving behavioral intervention from arm 2. Participants will also be eligible for the Raffle Financial incentive, where participants can earn prize money for seat belt adherence and/or no phone use while driving.

The research team will use psychology and communications research to present information about seat belts and distracted driving in a way that builds intrinsic motivation to change. Because positively framed messages are more effective at promoting seat belt wearing, the team's messaging will employ this framing. Education will address common reasons that survey participants give for not consistently buckling up or for phone use while driving.

Calculated as the number of trips during which a driver's seat belt click was detected, divided by total number of trips (defined as 1/10 of a mile or greater).

This is a composite outcome that measures the proportion of total trip time in which the driver is engaged in handheld phone call use or non-call handheld use (e.g. texting, swiping, and typing), as measured by the Way to Drive app.