Virginia State Inspection Practice Test

Trailers made after January 1, 1964, with a gross weight of 3,000 lbs or more, must meet certain emergency brake requirements. What is one of those requirements?

1. Must allow manual brake signaling

2. Must automatically apply braking upon breakaway

3. Must have a visual alert system

4. Must be equipped with an additional safety chain

The correct answer is: Must automatically apply braking upon breakaway

Trailers manufactured after January 1, 1964, that have a gross weight of 3,000 lbs or more are required to have a braking system that includes the ability to automatically apply the brakes in the event of a breakaway. This requirement is crucial for ensuring safety on the road, as it helps to prevent uncontrolled movement of the trailer if it becomes detached from the towing vehicle. When a breakaway occurs, the automatic braking system activates, bringing the trailer to a stop instead of allowing it to continue rolling, which could lead to accidents or damage. This regulation is rooted in safety standards that aim to minimize risks associated with trailer towing. Having an automatic breaking system not only protects other road users but also mitigates potential property damage. Therefore, the requirement for trailers to automatically apply brakes upon breakaway serves as an essential safety feature for heavier trailers.