You should turn your wheels _______ when parking uphill where there are no curbs.

When parking uphill in a situation where there are no curbs, turning your wheels to the right is the correct action. This positioning prevents the vehicle from rolling into traffic if it were to accidentally move. By directing the wheels to the right, the vehicle will roll off the road and toward the shoulder if it begins to roll backward, thereby reducing the risk of a collision with other vehicles.

Turning your wheels towards traffic or only slightly does not provide adequate safety because those positions do not effectively prevent the vehicle from entering the roadway. Likewise, turning the wheels to the left might send the car directly into the lane of oncoming traffic if it were to roll backward, which increases the danger to both the vehicle and other road users. Therefore, turning your wheels to the right when parking uphill without curbs is the safest practice.