How does the effect of automatic load-dependent braking-force regulators (ALB) and automatic anti-locking devices (ABS) differ?

The combination of choices 1 and 2 is correct because they accurately describe the functions of ABS and ALB.

1. An anti-locking device (ABS) prevents the wheels from locking during braking, regardless of the weight of the vehicle and the conditions on the roadway. This feature is particularly important for maintaining steering control and stability in emergency braking situations.

2. An automatic load-dependent braking-force regulator (ALB) adapts the braking force based on the load carried by the vehicle’s axles. This ensures that heavier loads receive more braking force, preventing rearward wheel lock-up, which is critical for safe braking and vehicle stability.

Option 3 is incorrect because ALB does not adjust braking force based on roadway conditions; instead, it focuses solely on the vehicle's axle load. Understanding these devices is crucial for safe driving practices in accordance with German traffic regulations, which emphasize vehicle safety and proper braking systems.