What does autonomous driving L2 level mean?
2 Answers
Autonomous driving L2 level is classified as semi-autonomous driving, which enables the vehicle to operate multiple functions while requiring the driver to control a few functions. Below are two essential systems that autonomous driving L2 level must have: 1. Adaptive Cruise Control System: Also known as ACC adaptive cruise control system, the latest commercial version is the third-generation ACC adaptive cruise control system. It uses front radar sensors to collect signals and automatically follows the preceding vehicle for acceleration and deceleration. It also features the Stop-Go function, making it not only suitable for highway conditions but also ideal for urban driving. The AEB (Automatic Emergency Braking) system assists in braking when the distance to the preceding vehicle or pedestrian is less than the safe distance, helping to prevent collisions. 2. Lane Keeping System: During turns, the vehicle can easily deviate from its lane due to inaccurate steering by the driver, especially for novice drivers who have just obtained their licenses. Once the vehicle enters the opposite lane during a turn, it can be very dangerous.
In the automotive industry, Level 2 autonomous driving (L2) refers to partial automation systems where the vehicle can handle steering and acceleration/deceleration tasks, such as adaptive cruise control or lane-keeping assist. My understanding is that it functions like a smart assistant, allowing you to relax your hands and feet during long-distance driving, but you must continuously monitor the road conditions and be ready to take over at any moment. The system may fail under insufficient lighting or in rainy/snowy weather. In practical driving, it feels like having someone share the workload without taking full responsibility. Compared to L1, which only assists with braking or acceleration, L2 offers more comprehensive functionality and is more widely adopted in new cars like the Tesla Model 3. However, it is by no means equivalent to the advanced automation of L3—the latter allows for brief hands-off periods. The key is not to overestimate the technology; it's merely an assistive tool, not full self-driving.
