When parking on a hill, how should the wheels be positioned when facing downhill?

When parking on a hill facing downhill, the correct practice is to turn the wheels toward the curb. This positioning ensures that if the vehicle were to roll, it would roll into the curb rather than into traffic or down the hill. By turning the wheels toward the curb, the tire's sidewall will make contact with the curb, helping to prevent the vehicle from moving freely.

In contrast, positioning the wheels away from the curb could allow the vehicle to roll into the street if the brakes were to fail or if the vehicle were to slip from park. Keeping the wheels straight would also not provide any protection against rolling away. Turning the wheels at a 45-degree angle is unnecessary and does not align with the best practices for safety when parking on a slope.