Question

Difficulty: MediumSpeed Limits and Speed Regulation

A motorist is driving on a municipal road with a posted maximum speed limit of 30 mph30\text{ mph} and approaches an uncontrolled blind intersection where overgrown foliage completely obstructs the view of cross traffic. Under standard speed regulation laws, how should the driver adjust their speed?

  1. Reduce speed to a rate, such as 15 mph15\text{ mph} or less, that grants a clear view of cross traffic and allows stopping safely if another vehicle or pedestrian appears.Answer
  2. B
    Maintain the posted speed limit of 30 mph30\text{ mph} unless a vehicle on the intersecting road is actively visible.
  3. C
    Maintain 30 mph30\text{ mph} while continuously sounding the horn to alert unseen drivers of the vehicle's approach.
  4. D
    Accelerate slightly before entering the intersection to clear the blind zone as quickly as possible.

Answer

The driver must reduce speed to a safe rate, typically 15 mph15\text{ mph} or lower at a blind intersection, allowing enough sight distance to yield or stop safely if cross traffic approaches.
The correct answer correctly applies the Basic Speed Law, which dictates that drivers must adjust their speed downward from the posted limit when approaching hazards such as blind intersections. Reducing speed to 15 mph15\text{ mph} or less provides adequate reaction time and stopping distance if cross traffic or pedestrians suddenly emerge.

Step-by-Step Solution

1
Identify the hazard and visibility restrictions
The driver observes an uncontrolled intersection where cross traffic cannot be seen due to overgrown foliage.
Sight obstructions reduce stopping reaction time and prevent early detection of cross traffic.
2
Apply the Basic Speed Law to the scenario
Recognize that the posted speed limit of 30 mph30\text{ mph} is only safe under ideal conditions and must be reduced when hazards or visual barriers exist.
Statutory speed regulations mandate driving at a speed that is reasonable and prudent for existing road conditions regardless of the posted limit.
3
Select the correct speed adjustment procedure
Slow down significantly before entering the blind intersection.
Lowering speed reduces braking distance and ensures the driver can stop if another road user enters the intersection.

Key Concept

Basic Speed Law and Speed Regulation at Blind Intersections
Estimated Time:1m 0s
Rate this question