Final answer:
The suggested advanced warning sign spacing for Urban (low speed) is 100 feet. This spacing allows drivers enough time to react to potential hazards ahead and ensures they are adequately informed about upcoming road conditions.
Step-by-step explanation:
The suggested advanced warning sign spacing for Urban (low speed) is 100 feet.
This is important because it provides drivers with enough time to recognize and react to potential hazards ahead.
Spacing the advanced warning signs at regular intervals ensures that drivers are adequately informed about upcoming changes in the road conditions.