What action is illegal at a yield sign?

Proceeding without yielding at a yield sign is illegal because the primary purpose of a yield sign is to alert drivers that they must slow down and give the right-of-way to other vehicles and pedestrians. When a driver encounters a yield sign, they are required to assess the situation and ensure that it is safe before continuing. Failing to yield can lead to dangerous situations, including collisions, particularly if there are other vehicles or pedestrians that have the right of way.

The other actions, such as giving way to pedestrians, slowing down, and yielding to oncoming vehicles, are all appropriate responses at a yield sign. These actions help maintain safety on the road and ensure that traffic flows smoothly, complying with the rules of the road.