Final answer:
A vertical rectangular sign might represent a hill, crossroad, pass w/ care, or railroad crossing.
Step-by-step explanation:
The vertical rectangular sign that might be a hill, crossroad, pass w/ care, or railroad crossing is true. These are common road signs that provide important information to drivers. A hill sign indicates that there is a hill ahead, a crossroad sign indicates that there will be a crossroad ahead, a pass w/ care sign indicates that drivers should pass with caution, and a railroad crossing sign indicates that there is a railroad crossing ahead.