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Question

Difficulty: HardParking, Standing, and Stopping Regulations

When securing a vehicle parked facing uphill on a street bordered by a raised concrete curb, how must the driver position the front wheels to prevent the car from rolling into moving traffic if the brakes fail?

  1. Turn the steering wheel so the front tires point away from the curb, allowing the tire to roll back gently until it makes contact with the curb.Answer
  2. B
    Turn the steering wheel so the front tires point toward the curb, ensuring the tire treads face the sidewalk.
  3. C
    Align the front tires perfectly straight along the roadway edge regardless of the street incline.
  4. D
    Position the front tires straight ahead while leaving the transmission in neutral with only the emergency brake engaged.

Answer

The driver should turn the front tires away from the curb (to the left) so that the back edge of the front tire will block the vehicle against the curb if it begins to roll backward.
When parking facing uphill where a raised curb is present, turning the front wheels away from the curb (left) allows the rear edge of the front tire to roll back and press against the curb. This creates a mechanical stop that prevents the vehicle from rolling into traffic lanes.

Step-by-Step Solution

1
Analyze the direction of the incline and the presence of a curb
The vehicle is facing uphill, and a raised curb is present along the side of the road.
Vehicle rollback physics differ depending on whether the road slopes up or down and whether a physical curb barrier exists.
2
Determine the direction of potential vehicle movement in a brake failure scenario
An unrestrained vehicle facing uphill will roll backward down the slope.
Gravity exerts a backward force on the vehicle along the grade.
3
Determine tire placement so the curb physically blocks movement
Turning the front wheels away from the curb causes the back edge of the front tire to catch firmly against the curb face as the vehicle rolls back.
This uses the curb as an active wheel block to stop the car from entering traffic lanes.

Key Concept

Hill Parking Tire Placement with Raised Curb
Estimated Time:1m 15s
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Topics

Parking, Standing, and Stopping Regulations

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