On a hill uphill without a curb, which wheel direction helps prevent the vehicle from rolling into traffic?

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When you’re parked on an uphill slope with no curb, you want to direct the front wheels toward the edge of the road (the shoulder). Gravity will pull the car downhill, and turning toward the edge keeps any potential roll away from traffic, guiding it toward the roadside rather than into the lane. If the wheels were turned toward the curb or left straight, a brake failure could allow the car to roll into traffic. This wheel position helps create a safer path for the vehicle if it starts to move. Using the parking brake in addition reinforces this safety.