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  The reasonable distance between adjacent cars is very crucial for roadway traffic safety. For different types of drivers or different driving environments, the required safety distance is different. However, most of the existing rear-end collision models do not fully consider the subjective factor such as the driver. Firstly, the factors affecting driving drivers’ characteristics, such as driver age, gender, and driving experience are analyzed. Then, on the basis of this, drivers are classified according to reaction time. Secondly, three main factors affecting driving safety are analyzed by using fuzzy theory, and the new calculation method of the reaction time is obtained. Finally, the improved car-following safety model is established based on different reaction time.   https://youtu.be/h7mm768Plgc   Understanding the dynamics of a car accident is a difficult task. Starting from the final scene of the crash, reconstruction experts need to work backward in time and determine for eac

There’s an argument that periodically surfaces about the semantics (i.e. the meaning) of accidents vs crashes (or collisions). Some people argue that when a vehicle crashes it is never an accident because it was preventable. However, this is simplistic and, well, wrong.   https://youtu.be/cnOL-U6Dens   The word ‘accident’ describes intent. If we look at one definition of accident it is an unfortunate incident that happens unexpectedly and unintentionally, typically resulting in damage or injury. Therefore, if you throw a knife at a group of people and it hits and stabs one of them, it’s not an accident because it was deliberate; however, if you trip in the kitchen while carrying a knife and you stab someone, it is an accident. Sure, you should have perhaps been more careful, and you could have decided to carry the knife in a sheath, but the fact remains that you had no intention of stabbing the person in the second instance, you were simply moving the knife from one place to another. T