In which situations might legal maximum weights not be safe?

The correct answer highlights that legal maximum weights may not be safe during bad weather and on mountain roads due to the additional challenges posed in these environments.

In adverse weather conditions, such as rain, snow, or ice, the stopping distance and traction of a heavy vehicle are significantly compromised. Heavier loads can increase the risk of skidding or losing control, making it essential for drivers to reevaluate their load weight and potentially reduce it to ensure safety.

On mountain roads, the terrain introduces steep grades and sharp curves, which can be particularly hazardous for heavy vehicles. The weight of a truck significantly affects its ability to brake effectively downhill, where the risk of brake failure increases if the vehicle is too heavy. Additionally, navigating uphill can be more challenging with a legal maximum load, resulting in strain on the engine and transmission.

Understanding these challenges is key for drivers to maintain safety, as they must adapt to the conditions of the road and environment rather than just adhering to legal weight limits.