Which of the following is a clear example of an immediate hazard?

An immediate hazard is a situation that presents an immediate risk to safety and could lead to harm or injury if not addressed promptly. The example of people darting into the road fits this definition clearly, as it indicates a sudden and unpredictable movement that could lead to a serious accident with oncoming vehicles. This action shows a lack of caution and poses a direct threat to both the individuals themselves and drivers, necessitating immediate awareness and response to prevent a potential collision.

In contrast, a car parked with its door open could be a concern but does not necessarily present an immediate danger unless someone is actively exiting the vehicle in a way that could be dangerous. A pedestrian standing on a street corner may be vulnerable, but if they are waiting to cross, the situation is not inherently hazardous. A speed limit sign provides important information for drivers but does not, by itself, constitute a hazard.