Final answer:
When traveling on snowy or icy roads, a driver should choose winter tires for more friction and may encounter roads treated with salt to prevent ice formation. Winter tires and salt use both aid in improving traction and safety in cold, slippery conditions.
Step-by-step explanation:
When traveling on snowy or icy roads, a driver should make several adjustments to ensure safety. One key adjustment is the choice of tires. Winter tires are designed to create more friction with the road compared to summer tires, which is crucial for maintaining traction on slippery surfaces. Another common example where more friction is desirable involves sports; for instance, using cleats in soccer or football helps players maintain a better grip on the ground.
Additionally, salt is often spread on roads in cold climates to lower the freezing point of water, which helps to prevent the formation of ice and makes the roads safer for travel. The process, known as freezing point depression, is a principle that can be understood through the study of solutions in chemistry.
Overall, these adjustments account for the increased risks associated with colder temperatures and slick road conditions. Fuel efficiency or the severity of the winter do not directly affect the adjustments a driver should make for icy conditions.