What could happen if you drive away with a trailer that has no spring brakes after incorrectly coupling?

When you drive away with a trailer that has no spring brakes after an incorrect coupling, one significant risk is that you may experience no trailer brakes. Spring brakes are a crucial safety feature for trailers, specifically in combination vehicles. If these brakes are not functioning due to improper coupling, you may not have the adequate braking power needed to slow down or stop the trailer effectively.

This scenario becomes particularly dangerous, as the driver will rely solely on the tractor's brakes. If the trailer does not have its own braking system engaged, it could lead to increased stopping distances and a higher likelihood of losing control of the vehicle. Proper coupling is essential to ensure that the trailer can brake effectively in sync with the truck, preventing potential accidents.

While the other situations, like losing the trailer or experiencing brake failure, can certainly cause issues, it's the lack of trailer brakes that directly results from this specific situation, making it the most relevant outcome when coupling is not done correctly.