When is it required by law to have trailer brakes?

The requirement for trailer brakes is often determined by the combined weight of the trailer and the vehicle towing it. The correct answer specifies that trailer brakes are legally required when the combined weight reaches 3,000 lbs. This regulation is put in place to ensure safe towing practices; heavier loads require more stopping power and longer distances to stop safely.

When the total weight goes beyond this threshold, the brakes on the trailer become essential to assist the vehicle's brakes in controlling the overall stopping ability, thereby enhancing safety on the road for both the driver and other road users. Understanding these weight limits helps ensure compliance with safety regulations and promotes safe towing practices.