A space cushion is the area of space around your vehicle that provides a buffer between you and other vehicles or obstacles. It allows for safe maneuvering, reaction time, and stopping distance in case of sudden changes in traffic conditions. Maintaining a proper space cushion helps reduce the risk of collisions and enhances overall road safety. By keeping a safe distance, drivers can respond more effectively to potential hazards.
A "space cushion"
"Space and visibility" refers to defensive driving techniques that result in space for the vehicle and visibility for the driver.
Maintaining a safe following distance is the most critical part of the cushion of safety in driving. This ensures that you have enough time and space to react to unexpected events or sudden stops from the vehicle in front of you.
Space cushion
You should increase your space cushion when driving on snow or ice by at least three times the normal following distance. This gives you more time to react to any sudden stops or slides on slippery roads. Remember to adjust your speed accordingly to maintain a safe distance.
Space cushion
The Front
Your stopping distance on a snow covered road it 10 times great than on dry pavement. So, the answer to your question is to increase your space cushion by 10 times.
There really is no advantage to increasing your space cushion, the problem is that other drivers always think you are being courteous enough to allow them into your lane.
In California, it's a "three second cushion" of space when following other vehicles. http://www.dmv.ca.gov/pubs/dl603/teen_htm/drivingskills.htm
Everything
It fills them with a soft cushion so driving will be smoother.