What is the following distance at 100 km/h on the highway?
4 Answers
On the highway, the following distance at 100 km/h should be more than 100 meters. When a motor vehicle is traveling on the highway at a speed exceeding 100 km/h, it should maintain a distance of more than 100 meters from the vehicle in front in the same lane. If the speed is below 100 km/h, the distance from the vehicle in front can be appropriately reduced, but the minimum distance should not be less than 50 meters. Relevant information about automotive radar is as follows: Introduction: Automotive radar, as the name suggests, is radar used for cars or other ground motor vehicles. Therefore, it includes various radars based on different technologies (such as laser, ultrasonic, microwave) with different functions. Collision avoidance radar: This type of radar can measure hazardous obstacles on the road ahead that may cause collisions based on the vehicle's current direction and speed, making it suitable for situations with low atmospheric visibility or poor judgment (such as too short a distance or too high a speed).
When driving at 100 km/h on the highway, I always maintain a following distance of at least 100 meters. This is based on a fundamental principle of safe driving called the two-second rule: pick a fixed point on the roadside, and after the car in front passes it, I should reach that point no sooner than two seconds later. At 100 km/h, a two-second distance is approximately 56 meters, but to account for sudden braking by the car ahead or unexpected road hazards, it’s recommended to extend it to over 100 meters. I personally use road markings to estimate the distance—each line is 10 meters apart, so I ensure a gap of 10 lines. In bad weather, I double this distance. After making this a habit, I drive more relaxed, and the risk of accidents is significantly reduced. The most important thing in driving isn’t speed but leaving enough space for a buffer while staying focused to react to any situation. Safe distance isn’t just a number—it’s a lifestyle attitude.
From my two decades of driving experience, maintaining at least a 100-meter following distance at 100 km/h is the safest approach. Once while driving on the highway at night, the car ahead suddenly swerved to avoid an animal, and it was precisely because I kept this distance that I managed to brake safely. That lesson was deeply ingrained: distance is your safety net. In daily driving, I use vehicle reference points or count seconds to estimate distance—100 meters is roughly equivalent to 10 car lengths. When roads are wet or traffic is complex, I automatically increase it to over 120 meters. A veteran's insight: every extra meter at high speed buys you more reaction time. After making this a habit, I drive with calm confidence, brake less abruptly, and even reduce tire wear. The key is consistency—let maintaining distance become instinctive, avoiding distractions that disrupt your driving rhythm.
When I first learned to drive, the instructor repeatedly emphasized maintaining a following distance of over 100 meters at a speed of 100 km/h on the highway. He taught me the counting method: after the car in front passes a road marker, I should silently count 'one, two' before I pass the same point to ensure safety. A 100-meter distance may seem far, but on the highway, it can close in the blink of an eye. During practice, I found that this distance gave me ample time to react to lane changes or sudden braking by the car ahead, avoiding the common rear-end mistakes made by beginners. Now, driving independently, I still use this method—choosing a bridge pier or tree as a reference point. After making it a habit, driving has become much less stressful and more stable. Safety comes first; this distance is a fundamental safeguard, especially in heavy traffic—never skimp on it.
