braking distance

Model Perspective

Jul 7, 2022 · Fundamentals

Is the 2‑Second Rule Really Equivalent to the One‑Car‑Length Rule? A Mathematical Model

By comparing the traditional one‑car‑length spacing rule with the widely used 2‑second rule, this article builds a mathematical model of braking distance based on reaction time, speed, and vehicle mass, estimates parameters using real traffic data, and proposes a generalized t‑second rule.