Question

the distance required to stop your vehicle *

• increases as your speed increases
• decreases when roads are wet
• decreases when traction decreases

you can maintain an adequate time margin by *

• avoiding oncoming traffic on narrow bridges
• adjusting your space margin when passing wide vehicles
• increasing or decreasing your speed as needed

Explanation:

Analyze stopping distance factors

The first question asks about the factors affecting the distance required to stop a vehicle.

• As speed increases, kinetic energy increases quadratically, which significantly increases the stopping distance. Thus, stopping distance increases as speed increases.
• Wet roads and decreased traction reduce the braking force, which increases (rather than decreases) the stopping distance.
• Therefore, the correct option is "increases as your speed increases". We apply the concept of Speed Management to understand how velocity dictates safe stopping margins.

Analyze time margin maintenance

The second question asks how to maintain an adequate time margin.

• A time margin (or following distance) is maintained by adjusting the gap between your vehicle and others.
• Increasing or decreasing your speed as needed allows you to adjust and maintain a safe temporal buffer (e.g., the 3-second rule) behind the vehicle ahead.
• While managing space around wide vehicles relates to Space Margins, directly controlling your speed is the primary mechanism to regulate a time-based margin. Thus, "increasing or decreasing your speed as needed" is the correct choice.

Answer:

Question 1

• (A) increases as your speed increases (Correct answer)
• (B) decreases when roads are wet
• (C) decreases when traction decreases

Question 2

• (A) avoiding oncoming traffic on narrow bridges
• (B) adjusting your space margin when passing wide vehicles
• (C) increasing or decreasing your speed as needed (Correct answer)