When parking an automatic car on a street sloping uphill, what should you do?

When parking an automatic car on a street that is sloping uphill, it is important to ensure that the vehicle remains securely in place and does not roll away. By putting the transmission in "P" (park) and engaging the handbrake, you effectively lock the transmission, preventing the car from moving. The handbrake (or parking brake) adds an extra layer of security by restraining the rear wheels, further ensuring that the vehicle stays stationary on the incline.

The "P" setting in the transmission gears is specifically designed to restrict the movement of the vehicle when parked, making it an essential step to prevent unwanted rolling. Engaging the handbrake is a critical safety measure, particularly on inclines, as it helps to secure the vehicle in place. This combination of using the handbrake and setting the transmission to "P" ensures that the vehicle is safe and stable while parked on a slope.