What does a vertical rectangle sign usually signify?
Answer: C — Regulatory sign
A vertical rectangle sign usually signifies a regulatory sign. Regulatory signs provide information about rules and regulations that drivers must obey, such as speed limits, parking restrictions, and traffic direction. These signs are important for maintaining order and safety on the road by informing drivers of legal requirements and restrictions. In contrast, guide signs provide information about routes, distances, and services, warning signs alert drivers to potential hazards ahead, and no passing signs indicate areas where passing is prohibited.