Using Advanced Driver Assistance Systems (ADAS)

Advanced Driver Assistance Systems (ADAS) refer to integrated electronic suites that utilise various vehicle-mounted sensors (such as millimetre-wave radars, ultrasonic sensors, LiDAR, and cameras) to collect real-time data on the cabin environment, vehicle status, and road conditions. By processing this data through on-board algorithms, the system assists the driver with specific driving tasks or actively intervenes during critical hazards. It serves as an essential stepping stone towards fully autonomous driving, with its core purpose remaining firmly rooted in "assisting" rather than "replacing" the driver.

Core Attributes and Autonomy Levels

Understanding Levels (SAE Level 1 to Level 2+): Currently, the vast majority of mass-production vehicles equipped with driver assistance systems fall under Level 1 (Driver Assistance) or Level 2 (Partial Automation) as defined by the SAE (Society of Automotive Engineers). At the L1/L2 stage, the system can simultaneously manage longitudinal acceleration/braking and lateral steering; however, the driver remains solely responsible for vehicle safety and must be ready to take over control at all times.

Boundary Management in "Human-Machine Shared Driving": While driving control is shared between the system and the driver, the handover of control must be seamless. The moment road conditions exceed the system's Operational Design Domain (ODD), it will trigger an alert requiring the driver to intervene immediately; any lapse in driver attention can lead to disastrous consequences. 

Core Subsystems and Functional Breakdown

Modern ADAS suites typically consist of several key functional modules, each engineered for specific safety and driving fatigue relief roles:

Module 1: Adaptive Cruise Control (ACC / Adaptive Cruise Control) 

How It Works: Utilising front-facing radar and cameras to detect the distance and speed of the vehicle ahead, ACC automatically modulates the throttle and brakes within the preset speed limit to maintain a safe following distance. In heavy traffic, it also supports automated stop-and-go (Stop & Go) functionality.

Module 2: Lane Keeping Assist & Lane Centring Control (LKA / LCC)

How It Works: Through lane-recognition cameras, the system continuously monitors the vehicle's position within the lane markings. Should the vehicle inadvertently drift out of its lane, the system steers it back into the centre via steering wheel vibrations, audible chimes, or by actively applying corrective steering torque. 

Module 3: Autonomous Emergency Braking (AEB / Autonomous Emergency Braking)

How It Works: Serving as the final active safety fail-safe, the system instantly applies maximum braking pressure if an imminent collision risk is detected (such as sudden hard braking ahead, or pedestrians and motorcyclists suddenly cutting across) and the driver fails to react in time, thereby mitigating or completely avoiding an impact.

Best Practice Guidelines and Safe Operating Procedures

Operating ADAS requires a clear understanding of its limitations; treating it as "fully autonomous driving" or abusing the system is strictly prohibited.

Step 1: Pre-Drive Assessment and Selecting Suitable Road Conditions

Strictly Limited to Expressways and Controlled-Access Highways: 

The vast majority of Level 2 systems are engineered for well-marked, high-visibility highways and expressways. Engaging these systems on complex, undivided rural/trunk roads, congested urban areas with heavy pedestrian and motorcycle traffic, or under adverse weather (torrential rain, thick fog, or poor visibility obscuring lane markings) is strictly prohibited. 

Ensure Sensors Are Clean and Free from Obstructions: 

Before setting off, always inspect the windscreen camera zone and front/rear radar sensors to ensure they are not covered by grime, mud, heavy dirt, or tinted film stickers, preventing system misjudgement or total failure due to sensor "blindness".

Step 2: Maintaining Constant Vigilance and Readiness for Dynamic Takeover 

Keep Both Hands on the Steering Wheel – Strictly No "Hands-Off": 

Even with lane centring active, the driver must keep their hands lightly on the steering wheel at all times (most modern vehicles utilise capacitive steering wheels to detect touch). Using cheat devices such as water bottles or steering wheel counterweight rings to bypass hands-on detection is strictly forbidden.

Stay Alert to System "Blind Spots" and Technical Limitations:

Driver assistance systems—particularly vision-only or standard radar setups—exhibit natural blind spots or delayed recognition when encountering stationary obstacles (such as broken-down lorries on highways, roadwork water barriers, or temporary traffic cones). Drivers must maintain forward situational awareness at all times and be ready to step firmly on the brake pedal to take over immediately when anomalies arise, rather than entrusting their safety entirely to software algorithms.