Final answer:
Work area signs in orange color indicate caution in traffic areas where people are working, and traffic may be controlled by personnel. If no speed limit is posted, drivers must drive at a safe and prudent speed. Obeying work area signs and traffic control personnel's instructions is crucial for everyone's safety.
Step-by-step explanation:
The color of work area signs is orange, which signifies caution. When people are working on or near the roadway, traffic may be controlled by a flagger or other personnel. If no speed limit is posted, you must drive at a safe and prudent speed. It is important to obey work area signs and any instructions given by traffic control personnel to ensure everyone's safety.