**Traffic lights** have the highest priority in the hierarchy of traffic signals. This means that when a traffic light is present, its indications must be followed before any other signal, such as **vertical signs** or **road markings**.

- Traffic lights regulate the flow of traffic at intersections and other critical points, ensuring that vehicles and pedestrians move in an orderly and safe manner.
- Although vertical signs, such as **yield** or **stop** signs, are important, their function is secondary when a traffic light is operating. For example, if a traffic light is green, you can proceed even if there is a stop sign.
- **Road markings** on the pavement, such as lane lines or directional arrows, are also less prioritized than traffic lights. These markings help guide traffic but should be ignored if a traffic light indicates otherwise.

In summary, you should always follow the indications of traffic lights first, as they are the primary authority in traffic regulation on the roads.