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Model Perspective
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.

braking distancemathematical modelingreaction time
0 likes · 3 min read
Is the 2‑Second Rule Really Equivalent to the One‑Car‑Length Rule? A Mathematical Model
DataFunTalk
DataFunTalk
Nov 10, 2020 · Artificial Intelligence

Low‑Power ADAS on Didi’s JueShi Devices Reduces Traffic Accidents

This article describes how Didi’s vehicle‑vision team built an ultra‑low‑power ADAS solution on the JueShi dash‑cam platform, using lightweight detection models, temporal fusion, camera‑calibration techniques and data‑driven optimization to cut rear‑end collision rates by over 11% and improve overall traffic safety.

ADASEdge Computingcamera calibration
0 likes · 15 min read
Low‑Power ADAS on Didi’s JueShi Devices Reduces Traffic Accidents