Traffic Engineering MCQ with answer and solution

Concept

PIEV theory and driver reaction time components

Formula

NONE

Step-by-step solution

1. PIEV theory models the human driver's response process into four chronological stages: Perception, Intellection, Emotion, and Volition. 2. Perception: Sensation is received by sensory organs (eyes, ears) and transmitted to the brain. 3. Intellection: The driver recognizes, understands, and analyzes the situation based on perceived facts. 4. Emotion: Psychological responses such as fear, anger, or caution occur. 5. Volition: The driver decides upon and initiates the physical action (e.g., foot moves to brake pedal). 6. Therefore, the time required to understand the situation is Intellection time. Answer: B

Explanation

According to PIEV theory, the total driver reaction time is partitioned into Perception, Intellection, Emotion, and Volition. Intellection time is specifically defined as the time required for the driver to understand and comprehend the traffic situation after the stimulus is perceived. Perception is the time to see or detect the stimulus, emotion involves emotional feelings (fear, anger, panic), and volition is the final physical decision and motor action to initiate response such as applying brakes.

Why the other options are wrong

A) Incorrect: Perception time is the time taken to visually detect and transmit the sensation to the brain. C) Incorrect: Emotion time is the emotional reaction period (fear, panic, caution). D) Incorrect: Volition time is the execution of the physical decision like braking or swerving.

Shortcut

PIEV: P = Perceive stimulus, I = Intellect (Understand), E = Emotion, V = Volition (Action).

Common mistake

Confusing Perception time (initial visual detection of an object) with Intellection time (mental understanding and comprehension of the event).