Check out this graphic showing how you can plow the entrance to your driveway to prevent it from being blocked by snow plows. From the MODOT Website:
MoDOT’s top priority in a snowstorm is plowing state highways, which may require several trips down the same route.
Snow plowed from roads could end up blocking private driveways for some time. MoDOT recognizes the inconvenience this causes, but because of limited time and resources, plows can only clear private driveways at the request of local emergency officials.
To reduce the amount of snow that might block your driveway, shovel an open area along the shoulder at the entrance (see illustration below). Plow blades will then push snow into the area just before your driveway, leaving a much smaller amount in front of it.