Final answer:
To ensure safety and abide by traffic laws, you should stop before entering an intersection with blocked traffic and wait until it clears. Avoid speeding up or changing lanes quickly, as these actions can cause accidents and further congestion.
Step-by-step explanation:
When approaching an intersection and noticing the roadway beyond is blocked with traffic, the correct action to take is to stop before entering the intersection and wait until traffic ahead moves on. This action prevents blocking the intersection, which can cause further traffic congestion and potentially block emergency vehicles or cause accidents. It's important to never enter an intersection unless you can completely pass through it without stopping. Changing lanes quickly or speeding up can create serious safety hazards, and it's essential to adhere to traffic laws that are designed to keep drivers and pedestrians safe. Remember, patience in traffic situations is not just courteous, but it's also the law.