N-S模型，是20世纪90年代由德国物理学家奈格尔（KaiNagel）和施莱肯伯格（Michael Schreckenbrg）发展出来的，是一个首尾相接的一维元胞自动机，用于高速路段的模拟。(The N-S model was developed by German physicist Nagel (KaiNagel) and Skei Leiken Berg (Michael Schreckenbrg) in 1990s. It is a one dimensional cellular automata, which is the first and the last connection. It is used for high-speed road simulation.)