Based on a simulation testing platform, the correlation between the main vehicle’s following speed, following distance, and other parameters under sudden traffic conditions is analyzed. An experimental scenario of “front vehicle stationary, preceding vehicle suddenly cutting out, and main vehicle decelerating to avoid collision” is designed. Through the collection and analysis of experimental data, the data in the simulation process is tracked, and the response performance of the main vehicle under different parameter conditions is evaluated. Latin hypercube sampling generalization tests are used to further explore and verify the applicability of the findings. The research indicates that the following speed and following distance exhibit a quadratic function relationship. Reasonably optimized following speed and following distance can significantly enhance vehicle driving safety.