Final answer:
Orange road signs signify construction and work zones, warning drivers about traffic pattern changes, detours, and hazards.
Step-by-step explanation:
Orange signs with black letters are used in construction and work zones. These signs warn drivers of changes ahead in the pattern of traffic, detours, and other road work-related hazards.
The color orange on road signs is chosen for its high visibility and association with caution, drawing attention to important information about road conditions. Orange signs are critical for maintaining safety by alerting drivers to various changes or dangers that may arise unexpectedly in construction or work areas.