Final answer:
True, orange signs indicate that drivers should be alert to changing conditions, adjust their speed, and prepare to stop, mainly used in construction and maintenance zones.
Step-by-step explanation:
The statement that an orange sign means drivers should be alert, adjust their speed, and be prepared to stop if necessary is True. Orange signs are typically used in road construction and maintenance areas to alert drivers of potential hazards or changes in traffic patterns. Drivers must pay special attention when they encounter an orange sign, as it often indicates that they need to slow down, be cautious, and be ready for unexpected conditions, including the possibility of stopping. An orange sign can be crucial in preventing accidents, especially in areas where traffic conditions can change suddenly due to construction or other temporary road work.