Final answer:
When parking uphill on a roadway with a curb, turn your tires away from the curb. This ensures that if the car rolls, it will be stopped by the curb, a measure that increases safety.
Step-by-step explanation:
When parking uphill on a roadway with a curb, the correct method is to turn your tires away from the curb. By turning your steering wheel to the left, your tires angle in such a way that if your car were to roll, the vehicle would come into contact with the curb, preventing it from rolling into the street. This is a safety precaution that capitalizes on the curb as a stopper. This practice is often part of driver education and aligns with safe and responsible driving habits. Regarding ideal speed and tire friction, these concepts highlight that friction is a key factor in keeping a vehicle stable, especially in dealing with curves or slopes, as the tire's grip on the pavement contributes to safe maneuvering.