Which behavior incurs the highest fine of $500?

The behavior that incurs the highest fine of $500 is a pedestrian causing an accident. In Puerto Rico, this strict penalty highlights the importance of pedestrian safety and the responsibility that pedestrians have when navigating roadways. This fine serves as a deterrent against negligent behavior by pedestrians, reminding them to adhere to traffic rules for their own safety and the safety of others.

In contrast, while other options may carry fines as well, they are typically not as severe as the penalty for a pedestrian causing an accident. Driving on the shoulder generally results in fines of lower amounts, as does failure to stop at a red light, which might focus more on vehicle operators rather than pedestrians. Unnecessary noises, while disruptive, usually incur smaller fines compared to serious safety violations involving pedestrians. This tiered approach to fines reflects the varying degrees of risk presented by different behaviors on the road.