What happens when you pass a large truck during rain or snow?

• A. There is no effect
• B. Traction increases
• C. Visibility increases
• D. Both traction and visibility are decreased

Answer: (D)

When you pass a large truck in rain or snow, you face two main hazards: reduced visibility and reduced traction. The truck throws up a wide spray from its tires, water and slush that can obscure your windshield and blinds you briefly. At the same time, the truck’s large wake creates turbulent air and gusts that can push your vehicle and upset its handling, especially on slick surfaces. On wet or snowy roads, tire grip is already compromised, so this disturbance makes it easier to lose control or slip. So, passing a large truck in bad weather tends to decrease both how well you can see and how well you can stay in control.