Final answer:
A sign that warns drivers to be alert for traffic coming from the right and left is typically a yield or crossroad warning sign. These help manage traffic and pedestrian safety by indicating potential hazards. A traffic signal can further improve safety by regulating the flow of vehicles and providing safe crossing times for pedestrians.
Step-by-step explanation:
The type of sign that warns you to watch right and left for cross traffic is typically a yield sign or a crossroad warning sign. These signs are designed to alert drivers that they need to be aware of potential hazards and prepare to stop if necessary. A yield sign indicates that drivers must give way to traffic on the intersecting road, while a crossroad warning sign indicates there are intersecting roads ahead and drivers should look both ways for traffic.
It's particularly important to have such signs in areas of heavy pedestrian activity, such as near a campus. Without a proper traffic signal, pedestrians may have to navigate through moving vehicles, which can lead to accidents. The installation of a traffic signal can markedly improve pedestrian safety by providing them the opportunity to cross at designated times, which in turn helps manage the flow of vehicular traffic and reduce the incidence of accidents.