Final answer:
During bad weather, the distance between vehicles should be increased to ensure safety due to reduced visibility and more hazardous driving conditions.
Step-by-step explanation:
During bad weather, what should be increased? The correct answer is 2) Distance between vehicles. Inclement weather conditions such as clouds, wind, and rain significantly reduce visibility and can make roads more treacherous. To ensure safety, it is essential that you increase the distance between your vehicle and the one in front of you. This allows more time to react to sudden stops or emergencies.
Unlike increasing the distance, increasing the speed limit would be counterproductive and dangerous in bad weather, considering that many vehicles already disregard speed limits. And while altering the time interval could be interpreted as a response, it typically refers to metrics such as traffic signals, not the spacing between moving vehicles which is the direct concern in poor driving conditions.