What is the difference between L2 and L3 autonomous driving?
2 Answers
Autonomous driving L2 is semi-autonomous driving, while L3 can achieve partial autonomous driving operations in specific environments. Here are the detailed introductions: 1. L2: L2 achieves semi-autonomous driving, allowing the vehicle to perform multiple functions, and the driver can take short breaks with their hands, but they still need to be ready to take over the driving task at any time. The functions included in L2 level are: full-speed adaptive cruise control, automatic parking, active lane keeping, speed limit recognition, automatic lane changing, etc. 2. L3: L3 enables the vehicle to perform partial autonomous driving operations in specific environments. It can judge whether to continue autonomous driving or return to manual operation by the driver based on road conditions, which can be considered as autonomous driving. The vehicle can almost independently complete all driving operations.
As a commuter with years of driving experience, I have a deep understanding of the differences between L2 and L3. L2 is like having adaptive cruise control and lane-keeping assist—the car can steer and adjust speed automatically, but I have to keep my eyes on the road and traffic at all times, with my hands ready to take over the wheel. There’s no room for relaxation. Using it during rush hour on the highway saves some effort, but even a moment of distraction, like glancing at my phone, could lead to an accident. L3 is different. Under specific conditions, such as on highways, the system can fully control the driving, allowing me to occasionally read a book or handle emails. However, if the car alerts me to take over, I must react immediately. Unfortunately, most cars today only support L2 because L3 requires infrastructure and regulatory support, and if the system fails, the responsibility still falls on me. Overall, L2 is practical but limited, while L3 is smarter but carries higher risks. When choosing, it’s essential to check the vehicle specifications carefully.
