The cold driver: Cold stress while driving results in dangerous behavior.

Area of Science:

• Environmental Psychology
• Human Factors Engineering
• Transportation Safety

Background:

• Cool vehicle cabin temperatures can cause non-hypothermic cold stress.
• Cold stress may impact cognitive functions and driving performance.
• Understanding these effects is crucial for road safety.

Purpose of the Study:

• To investigate the impact of cold stress on driving behavior.
• To assess changes in attention, psychomotor vigilance, and manual dexterity under cold conditions.
• To determine if cold perception correlates with driving behavior modifications.

Main Methods:

• Forty-four participants drove a high-fidelity driving simulator.
• Two conditions were tested: thermal neutral and local torso cooling.
• Participants completed driving tasks and cognitive assessments (attention, vigilance, dexterity).

Main Results:

• Skin temperature decreased significantly in the cold condition; core temperature remained unaffected.
• Drivers in the cold condition followed lead vehicles 22% closer and braked 20% later.
• No significant changes were observed in attention, psychomotor vigilance, or manual dexterity.

Conclusions:

• Cold environmental conditions can induce dangerous driving behaviors.
• Subjective cold perception is a predictor of altered driving patterns.
• Vehicle cabin temperature is a critical factor in maintaining safe driving.