What is the safe distance between cars on the highway?

[McChristopher]

When the speed exceeds 100 kilometers per hour, you should maintain a distance of more than 200 meters from the vehicle in front in the same lane. Here are the relevant guidelines: 1. When visibility is less than 200 meters: Turn on the fog lights, low beam lights, outline marker lights, and front and rear position lights. The speed should not exceed 60 kilometers per hour, and maintain a distance of more than 100 meters from the vehicle in front in the same lane. 2. When visibility is less than 100 meters: Turn on the fog lights, low beam lights, outline marker lights, front and rear position lights, and hazard warning flashers. The speed should not exceed 40 kilometers per hour, and maintain a distance of more than 50 meters from the vehicle in front in the same lane. 3. When visibility is less than 50 meters: Turn on the fog lights, low beam lights, outline marker lights, front and rear position lights, and hazard warning flashers. The speed should not exceed 20 kilometers per hour, and exit the highway from the nearest exit as soon as possible.